Chapter 22 Working with women in pregnancy
Learning outcomes for this chapter are:
1. To discuss the organisation and form of antenatal care within the context of the midwifery model
2. To illustrate a way in which evidence may be used to inform midwifery practice
3. To describe the essential components of antenatal care
4. To explain the purpose and process of the initial contact and booking visits
5. To describe and explain the concept of ‘decision points’ as a framework for organising care
6. To discuss the history and processes of establishing the estimated date of delivery
7. To list and describe routine antenatal blood screening, blood pressure and urine screening tests
8. To explain the purpose and process of abdominal palpation of pregnant women
9. To describe the assessment and significance of fetal movements
10. To explain the nature and provision of antenatal education and exercise programs in pregnancy
11. To discuss some of the physiological changes of pregnancy, with specific reference to nausea and vomiting, constipation and heartburn.
blood pressure (BP) measurement and monitoring
evidence-informed midwifery practice
health promotion and education
• partnerships with women—women-centred, negotiated relationships
• continuity of care in the holistic process of pregnancy, birth and early parenting
• support and empowerment of childbearing women
• promotion of holistic wellness
• assessment and screening, which includes risk identification, knowledge/understanding and choices
• information-sharing as a two-way process
• promotion of active, informed decision-making by women
• health promotion and education within an appropriate ‘adult learning’ approach.
In this chapter, antenatal care is discussed within a broad practice model of midwife-led continuity of care. While this model characterises New Zealand’s midwifery and maternity services, it is also becoming increasingly available in Australia and is the model to which the Australian midwifery profession aspires. The key components of routine antenatal care are identified using the New Zealand College of Midwives (NZCOM) ‘decision points’ as a framework (NZCOM 2008). Some of these components are further developed in the explanatory sections that follow. The decision points refer to relevant issues raised in other chapters of this book, and readers are also referred to other reading and research activity where appropriate. Notwithstanding the model of care in which a midwife may practise, the aspects of antenatal care described in this chapter are applicable to any setting.
Of necessity, this chapter discusses antenatal care as a discrete entity, and it may be tempting to consider it as such. However, antenatal care is but a small part of a woman’s experience of the broader process of pregnancy, and cannot be separated from childbearing as a holistic process, which includes pregnancy, birth and the postnatal period. Further, the meaning and effect of antenatal care is totally dependent on the individual woman and her personal context.
ANTENATAL CARE: WHAT IS IT?
Defining antenatal care as a conceptual entity, or even in terms of a list of discrete clinical components, is difficult. Definitions of antenatal care can vary markedly, depending on one’s beliefs or understanding of the childbearing process, be it from a midwifery or a medical perspective. The underpinning assumptions of these perspectives have been discussed in Chapter 3, but it is important to recognise how the midwife’s perspective will influence the aims, scope and content of the antenatal care she provides, and the way in which she provides this care.
However, much of what constitutes contemporary antenatal care throughout the world remains strongly rooted in the ‘medical’ model within which it developed. Widespread, institutionalised, routine antenatal care began less than 80 years ago, as a mass screening program, with the aim of reducing maternal and perinatal mortality, and brought ‘pregnancy’ under medical supervision and control for the first time in human history (Wagner 1994). The history and politics of antenatal care will not be discussed here. They are well articulated by many authors, such as Oakley (1984), Strong (2000), Katz Rothman (1989), Donnison (1988) and, in New Zealand, Donley (1998). What is of significance in this context are the beliefs and assumptions that continue to underpin the structure and content of various aspects of antenatal care. Traditionally, and in many contemporary contexts, antenatal care consists of a prescribed set of acts based around the clinical monitoring and screening of all pregnant women, regardless of their health or risk status. This establishment of routine antenatal care was based on the notion that pregnancy is a state of pathology, rather than of normal physiology. Oakley (1984) argues that ‘the most characteristic aspect of modern antenatal care is the clinical insistence on the probability of pathology in all childbearing’ (p 2). Over the past 80 years, technological advances have brought an ever-increasing array of screening tests and treatments, ‘most often … without proper scientific evaluation and concrete evidence of benefit’ (Villar et al 2001, p 2), although ‘few of the procedures commonly undertaken have a major impact on morbidity or mortality, and some may have no effect’ (Villar et al 2001, p 2). Further, some have been found to cause physical, emotional or social harm (Wagner 1994). Hall (2001) contends that there are ‘remarkably few antenatal measures [which] are known to be effective: these are screening for and prevention of [some] infections; prevention, detection and treatment of anaemia; detection of malpresentations so that external cephalic version can be offered; and detection, investigation, and treatment of pregnancy hypertension’. These measures clearly illustrate the scope of antenatal care from a medical perspective, and the outcomes of value that are expected from it.
Some might argue that routine antenatal care fails to meet reasonable expectations of its relevance and effectiveness. If this is indeed the case, then it may be possible to mount a case to abandon it. However, such a proposition would be inappropriate from a midwifery point of view. Maternal and perinatal morbidity and mortality are not the only outcome measures of value. There is substantial evidence that midwifery-provided continuity of care has beneficial effects on other outcome measures, such as reduced anxiety, a greater sense of control (Oakley 1992), reduced use of drugs for pain relief in labour, reduced likelihood of the need for newborn resuscitation, and greater satisfaction with antenatal, intrapartum and postnatal care (Hatem et al 2008; McCourt & Page 1996; Page et al 1999). It is extremely important that all those who provide care clearly articulate the scope and limitations of the screening and diagnostic tests used in antenatal care.
ORGANISATION OF CARE
The provision of antenatal care in Australia and New Zealand has traditionally been based on a medically defined, controlled and provided system of assessment, screening and monitoring of pregnant women, which was initiated in Britain and established in the 1920s (Hall 2001).
In Australia this remains largely unchanged, although there are increasing examples of alternative models (Reiger 2001; Tracy 2005). In particular the new legislation introduced into Federal Parliament on 23 June 2009 by Health Minister Nicola Roxon proposes to extend access to the Pharmaceutical Benefits Scheme (PBS) and the Medicare Benefits Schedule, thereby enabling midwives to provide antenatal care in the community under their own responsibility. If these legislative changes are made, they will open up the possibility of midwifery models of care as alternatives to the mainstream maternity care systems. Under the new arrangements, midwives wishing to provide care under Medicare and prescribe certain medicines under the PBS will need to demonstrate that they meet certain eligibility requirements and that they have collaborative
Auscultation of baby’s heart with electronic hand-held Sonicaid.
Reproduced with the permission of the New Zealand College of Midwives
arrangements in place, including appropriate referral pathways with hospitals and doctors to ensure that women receive coordinated care and the appropriate expertise and treatment as the clinical need arises.
In New Zealand, legislation enabling an alternative organisation of care was introduced in 1990, which enabled women to choose, and midwives to provide, full and complete maternity care for well women without referral or deferral to doctors. The regulatory framework within which this occurs is currently referred to as ‘Section 88’ of the Primary Maternity Services Notice (Ministry of Health 2007). Today, antenatal care in New Zealand is founded on the concept of a primary caregiver, known as a lead maternity carer (LMC), providing the majority of care and organising referral when care is outside the scope of practice of the LMC. See Chapter 1 for detailed discussion on the role and scope of LMCs in New Zealand.
The antenatal visit
The number and timing of visits follow a pattern, which was established when the concept of antenatal care was introduced in the 1920s (Candy et al 2003). This traditional pattern of antenatal visits—four-weekly from booking until 28 weeks gestation, fortnightly until 36 weeks and weekly until birth—remains the standard of antenatal care today in Australia and New Zealand. This format has no particular scientific, medical, social or midwifery foundation, and has recently been the subject of debate and challenge. This challenge arose from the concept of ‘evidence-based practice’ and has led to the evaluation of this aspect of antenatal care (Enkin et al 2000).
Determining the ‘optimal’ number of visits in routine antenatal care is extremely difficult. This is due to the complexity of the process of pregnancy itself, the diversity of childbearing women, and the context-bound, multidimensional nature of antenatal care in general (Strong 2000). Attempts to specify a particular number of visits have been based on research which measures only biomedical outcomes, such as incidence rates of preeclampsia, low birthweight, urinary tract infections, postpartum anaemia and perinatal mortality, although some studies have surveyed maternal satisfaction (Candy et al 2003; Carroli et al 2001; Petrou et al 2003; Villar et al 2001). Current recommendations, based on these studies and other similar research, are for a schedule with a reduced number of antenatal visits. The British National Institute of Clinical Excellence (NICE) guidelines (2008) and the Australian Three Centres Consensus Guidelines on Antenatal Care Project (TCCGACP (2001) both opt for a routine, for well women, of 10 visits for women having their first baby (primiparas) and seven for those having their second or subsequent baby (multiparas). It is notable, however, that a reduction in women’s satisfaction with fewer visits, as reported in research that studied this issue, has been minimised and largely ignored in these guidelines. Arguably, this illustrates the continuing dominance of the medical model as the foundation of contemporary antenatal care.
INITIAL CONTACT
Likewise, there is no standard terminology for or description of this initial contact. It may be referred to as the ‘options’ or ‘check-out’ visit or contact (to ‘check out’ meaning to gain a first impression or initial understanding of a person or a situation), and many midwives will have their own term for it. It is not the same thing as a ‘booking’ visit. The key feature differentiating this contact from a booking is that during the initial contact process, the woman and midwife share information that will enable a decision to be made about whether they will work together. The booking visit, by contrast, occurs as a result of that decision having been made.
There is also no standard format for the process itself. While individual midwives will perceive and prioritise its various stages and content differently, it needs to include certain elements in order to be meaningful to childbearing women. For women having their first baby, the system and process are new and unknown. They will often require specific information from the midwife, and will frequently be dependent upon guidance from her; they often don’t know what they need to know, in order to make an informed decision. It is the midwife’s role to facilitate informed decision-making by women, which includes the choices they make regarding their caregiver. For a list of questions that women should have answered by a prospective caregiver, see Box 22.1.
Box 22.1 Questions to ask a midwife
• Are you a member of the Australian/New Zealand College of Midwives?
• Is your practice reviewed annually, through the College Standards Review process? (New Zealand)
• How many women do you ‘book’ each month?
• Who is your back-up midwife? How do you work together?
• When will I meet her? Will I have the opportunity to get to know her?
• If I require consultation with an obstetrician or other specialist, what are my options?
• Under what circumstances would my care be transferred to hospital staff?
• Where do you provide antenatal visits?
• Between visits, are you available for me to phone for advice?
• Do you work with or refer to other healthcare professionals or support groups?
• Do you offer home birth? Do you have access to small birthing centres in the area?
• What hospitals do you have access to?
• What birthing options do you offer (e.g. water birth)?
• Do you come to my home when I am in labour?
• In labour, if I need care from an obstetrician, how will it be arranged?
• If this happens, what role will you play in my care?
• Under what circumstances would my care be transferred to hospital staff?
• If my labour is long, who will relieve you and provide my care?
• How often do you visit after the birth?
• If I need or choose to be in hospital after the birth, will you visit me there?
• What will your role be and what care will you provide, in that situation?
• For how many weeks do you provide care?
• Between visits, are you available for me to phone for advice?
• Do you work with or refer to other healthcare professionals or support groups?
(Source: Adapted from the New Zealand College of Midwives pamphlet, ‘Questions to ask when you choose a midwife’ (undated publication))
The professional level
There is variation in the context and scope of practice among midwives. This variation is due in part to differences in belief and understanding of the nature of pregnancy, birth and parenting, and reflects the midwifery philosophy that underpins their practice. Midwives may also feel more or less comfortable in a range of settings. Some work comfortably with women in an obstetric setting, while others are most comfortable in the primary, community or home-birth context. The way in which midwives practise professionally will vary according to these beliefs as well as their levels of experience, personal confidence and comfort zones, and their skills or knowledge base.
Summary points: initial contact
• The main purpose is to establish an equitable two-way partnership between the woman and the midwife:
• The midwife begins learning about:
• This process should function as a positive screening process for both the woman and the midwife.
• Each has the right to choose to work with the other.
• Both woman and midwife share information, and actively participate and make decisions in a negotiated partnership.
THE BOOKING VISIT
• be a two-way process of information-sharing and decision-making
• review the past, identify the present and plan the future
• include the identification of health, known ill-health, and risk markers for potential ill-health, for the woman or her baby
• include practical arrangements of care, in terms of frequency, time and place.
Antenatal assessment of baby wellbeing.
Reproduced with the permission of the New Zealand College of Midwives
It is about developing an effective working relationship at a professional level, between human beings.
Reviewing the past
Research findings suggest that midwives who use a ‘structured paper history’ incorporating a cue sheet (see Box 22.2) are likely to get ‘more and better information’ than those using an unstructured format (NICE 2008, p 69). Documentation of shared information is very important for both the woman and the midwife. During the care, it is appropriate for the woman to carry her own maternity notes (NICE 2008, p 70). Upon completion of care, the midwife also needs to keep a copy of these documents, in order to meet her respective professional and legal requirements.
Box 22.2 Historical health review
ABO = ABO blood group; APH = antepartum haemorrhage; Hb = haemoglobin level; HIV = human immunodeficiency virus; IUGR = intrauterine growth restriction; MRSA = methicillin-resistant Staphylococcus aureus; Rh = rhesus factor; SGA = small for gestational age; SIDS = sudden infant death syndrome; STI = sexually transmitted infection; SUDI = sudden unexpected death in infancy; TB = tuberculosis.
Identifying the present
As part of the booking visit, the midwife also undertakes a ‘current health review’ (see Box 22.3) and an initial examination, in order to establish baseline information and facilitate the process of planning the care. All the issues identified in the ‘current health review’, and those raised in the aforementioned historical health review, have the potential to influence the process or outcome of pregnancy, although some are more significant than others. They should provide the midwife with cues as to the nature and detail of any physical examination that may be required.
Box 22.3 Current health review
BMI = body mass index; BP = blood pressure; EDD = estimated due date; LMP = last menstrual period; MSU = midstream urine sample; STI = sexually transmitted infection.
Currently, there is no consensus as to the detail, make-up and content of a ‘routine’ initial physical examination of a well pregnant woman. Kean and Chan (2007) state that ‘there is very little to be gained from a full formal physical examination’ (p 70). They suggest that ‘routine auscultation for maternal heart sounds in asymptomatic women with no cardiac history is unnecessary’, and that neither formal breast examination nor routine pelvic examination is appropriate (Kean & Chan 2007). The NICE (2008) guidelines do not address the issue of cardiac examination, but support the recommendation against routine breast and pelvic assessments. In contrast, Frye (1998) recommends a full medical examination including the above checks and details such as assessment of lymph nodes, reflexes, mouth, eyes and lungs, in addition to the ‘vital signs’. It is debatable whether such an examination is indicated, or within the scope of midwifery practice. Certainly, midwives generally work with well women, and should have sound knowledge of normal anatomy, physiology and organ and hormone function as well as being able to recognise signs of dysfunction, but a routine full examination may be both inappropriate and outside the midwifery scope of practice. To date, there is limited evidence available which addresses this issue to any significant degree.
Planning the future
A MIDWIFE’S STORY
Questions
1. Describe the cues for potential family violence during the antenatal period. Consider:
2. How might you, as Maria’s midwife, have responded to those cues? Consider:
future care of the woman. The midwife and the woman are now in a position to make decisions about the relevance or appropriateness of particular screening or diagnostic tests, and to determine whether there is a need for referral for specialist consultation. This may be to any one or a number of specialists, such as an obstetrician, dietitian, physiotherapist, psychiatrist, sexual health specialist or geneticist. They are also in a position to make decisions about those other matters that are outlined in Decision point 1 (see page opposite).
DECISION POINTS
Decision points are a significant new initiative in the organisation of antenatal care. They provide a systematic framework for organising care, and are articulated in the New Zealand College of Midwives Midwives’ Handbook for Practice (NZCOM 2008). A modified and expanded version of these decision points has been developed for this chapter, a key theme of which is a holistic midwifery approach to antenatal care.
• routine antenatal blood screening
• routine blood pressure screening
• palpation—hands-on learning, identification and assessment
Details of the issues identified in the decision points but not covered in this chapter are covered in other chapters (see index).
DECISION POINT 1: THE BOOKING VISIT (BEFORE 12 WEEKS)
1 Information sharing
Information on community groups and agencies
• plans regarding pregnancy, birth and early parenting (care plan)
• physiological changes (see explanatory sections)
Midwife’s practice—support, time-off, how to contact, confidentiality
2 Assessment and screening
Review history (see Box 22.2):
Review current health status (see Box 22.3):
Initial antenatal screening—routine (with informed consent)
Screening options if risk markers from history or current health review
3 Active decision-making
LMC—decided prior to ‘booking’ process
Screening options—routine and options due to ‘risk markers’
Meeting/involvement of midwifery student
DECISION POINT 2: 16 to 20 WEEKS
1 Information-sharing
Decisions made since last visit—re screening, care plan, lifestyle changes
Results from screening or diagnostic tests, and implications discussed
Normal physiological changes (see explanatory sections)
Expectations re first fetal movements—timing range, initial irregularity
2 Assessment and screening
Assess woman’s wellbeing—discuss options re physiological changes
• Urinalysis (glucose and protein), blood pressure
• Blood test: offer MSS2 for Down syndrome and other conditions, if screening not offered earlier (16 weeks optimal)
• Discuss option of fetal anomaly scan (18–20 weeks), timing, expectations, limitations, information, diagnostic and decision options
3 Active decision-making
Scan (decision may be made after visit, form given if requested, self-booked)
Antenatal education decision made—classes booked if desired
DECISION POINT 3: 20 to 24 WEEKS
1 Information-sharing
Normal physiological changes (see explanatory sections)
Relationship issues—changes, support, involvement of partner/friends
2 Assessment and screening
Assess woman’s wellbeing—discuss options re physiological changes
Screen—urinalysis (glucose and protein), blood pressure
Assess baby’s wellbeing—size (fundal height), growth, movements, heart rate (Doppler/Sonicaid)
3 Active decision-making
Place for the birth (if decided)—if hospital: booking forms and arrange visit
DECISION POINT 4: 24 to 28 WEEKS
1 Information-sharing
Signs of premature labour and when to call midwife
Signs of baby’s wellbeing—expectations re movements (see explanatory sections)
Normal physiological changes (see explanatory sections)
DECISION POINT 5: 30 to 32 weeks
1 Information-sharing
Discuss options for working with pain in labour (see Chs 22 & 24)
Discuss signs of preeclampsia, and when to contact midwife
Discuss family’s expectations and preparations for life with a new baby
Discuss postnatal care plan—re vitamin K and newborn metabolic screen test
Discuss breastfeeding—‘skin to skin’, preparation, expectations and support
2 Assessment and screening
Assess woman’s wellbeing—discuss options re physiological changes (see explanatory sections)
Screen—urinalysis (glucose and protein), blood pressure
Assess baby’s wellbeing—size (fundal height), growth, movements, heart rate
3 Active decision-making
Postnatal care and support—community groups and agencies (well child services)
Plans for working with pain in labour
DECISION POINT 6: 34 to 36 weeks
1 Information-sharing
Discuss signs of labour, expectations, support, beliefs and feelings about labour
If home birth planned—discuss appropriate environment and gear needed
Physiological changes and expectations (see explanatory sections)