• Introduction
• The vulnerability of women

Biological
Social and economic vulnerability

• Mother to child transmission of HIV
• Antenatal care

Termination of pregnancy
Antiretroviral therapy

• Labor and delivery
• Infant feeding

For the non-breastfed infant
For the breastfed infant

• Post natal care of HIV infected mother and her infant

Introduction

Over 12.2 million women world wide have been infected with HIV since the start of the epidemic and women account for 42% of the 30.6 million adults now living with HIV. Because of the particular vulnerability of women, the risk of women contracting HIV is rising worldwide. Although these figures are increasing in industrialized and developing countries, in sub Saharan Africa there are already 6 women with HIV for every 5 men, with close to four-fifths of all infected women being African.

In African countries, where young people (age 15-24) account for 60% of all new infections, HIV infection in young women outnumbers infection in young men by 2 to 1. More than four-fifths of all infected women get the virus from their male sex partner, often by their one partner (their husband). The remainder become infected from blood transfusions or from injecting drugs with a contaminated needle. Women with sexually transmitted diseases (STD) such as gonorrhoea are often unaware of the disease because the infection is silent. Conclusive proof now exists that STDs facilitate the spread of HIV. An untreated STD in either partner increases the risk of HIV transmission during unprotected intercourse (without a condom) ten-fold. AIDS prevention campaigns often fail women by assuming that they are at low risk, or by urging prevention methods that women have little or no power to enforce, such as condom use, abstinence and mutual faithfulness within a relationship.

Women continue to make strides towards equality with men. However, for millions of women, this is far from reality. These women are the most vulnerable to HIV infection. In many parts of the world, nurses and midwives suffer the same vulnerabilities as women in the general population.

The vulnerability of women

Biological vulnerability
Research shows that the risk of becoming infected with HIV during unprotected vaginal intercourse is as much as 2-4 times higher for women than men. Women are also more vulnerable to other STDs (multiplying the risk of contracting HIV tenfold). One major reason for this is that women have a larger surface area of mucosa (the thin lining of the vagina and cervix) exposed to their partner's secretions during sexual intercourse. Additionally, semen infected with HIV typically contains a higher concentration of virus than a woman's sexual secretions. Younger women are even more at risk because their immature cervix and scant vaginal secretions put up less of a barrier to HIV., and they are prone to vaginal mucosa lacerations. There is also evidence that women again become more vulnerable to HIV infection after menopause. In addition, tearing and bleeding during intercourse, whether from rough sex, rape, or prior genital mutilation (female circumcision), multiply the risk of HIV infection, as does anal intercourse, which is sometimes preferred to vaginal intercourse because it is thought to preserve virginity and avoid the risk of pregnancy. Anal intercourse often tears the delicate anal tissues and provides easy access to the virus.

Social and economic vulnerability
Prevention messages urging abstinence, fidelity (faithfulness to one partner), condom use, needle exchange programs (for intravenous drug users) and encouraging and enabling people to get prompt STD treatments have all helped avoid HIV. However, for millions of women, their ability to make these decisions and to act upon them is crippled by their socio-economic circumstances. The majority of women in the world lack economic resources, and are fearful of abandonment or of violence from their male partner. Thus they have little or no control over how and when they have sex, and hence have little or no control over their risk of becoming infected with HIV.

This vulnerability is compounded by:

Lack of education
Millions of young girls are brought up with little knowledge of their reproductive system or how HIV and STDs are transmitted and prevented.

Sexual customs and norms
Typically, women are expected to leave the initiative and decision-making in sex to males whose needs and demands are expected to dominate. There is often a tolerance of predatory, violent sex, as well as a double standard where women are blamed or thrown out for infidelity (real or suspected), while men are expected or allowed to have multiple partners.

Lack of economic opportunities
There is a failure to respect women's right to equal access to education and employment opportunities, thus reinforcing their dependence upon men. Their reliance may be on a "sugar daddy," that is, a partner who may give gifts to pay for sex, a husband or stable partner, a few steady male partners who have fathered their children, or, for prostitutes, a succession of clients. In fact, in many cultures, sex is seen as a "currency."

Lack of control in relationships
Even when a woman suspects her partner has HIV, she often cannot risk losing his support by refusing sex, or insisting on condom use. She would be breaking the "conspiracy of silence" that surrounds extramarital sex by either partner. Although some men agree to use condoms, many react with anger, violence and abandonment.

Condom use and pregnancy
Couples wanting children need to know their HIV status. However, couples are often unwilling to openly discuss issues of sexuality, and voluntary HIV testing and counselling services are not always available.

STDs and HIV
Because STDs carry an especially heavy social stigma for women, they tend to avoid STD clinics and treatment. In addition, health care workers are often unsympathetic, judgemental, and unprepared to diagnose and treat STDs. Women are often socialized to accept ill health and women's troubles as their lot in life.

HIV and prostitution
Prostitutes have little power to protect themselves from HIV. In some countries, girls are forced into sex work, even before puberty. Such young girls are generally unaware of the AIDS risk and they are unable to take protective action, or run away. Women also turn to prostitution as an alternative to poverty, or because their lives have been disrupted by war, divorce or widowhood where, because of inequitable laws and customs, they have lost their property and their husband's earnings. Many sex workers risk violence or loss of income if they request the use of condoms. However, in some brothels, sex workers have banded together to insist on condom use.

Mother to child transmission of HIV

Mother to child transmission (MTCT) of HIV is the major means of HIV infection in children.
An estimated 600,000 children are infected in this way each year, accounting for 90% of HIV infection in children. Without preventive treatment, up to 40% of children born to HIV-positive women will be infected. Of those who are infected through MTCT, it is believed that about 2/3 are infected during pregnancy and around the time of delivery , and about 1/3 are infected through breast feeding. Most of the transmission in pregnancy occurs at the time of labour and delivery (more than 60%). Using the most widely available tests, it is not possible to tell whether a newborn infant has already been infected with HIV. The child of an infected mother may have maternal antibodies in his/her blood until 18 months of age. Therefore, testing cannot be used to help make decisions about whether or not to breast feed.

Antenatal care

Voluntary HIV testing and counselling (VCT) should be available in antenatal clinics. Many HIV-positive women will be diagnosed for the first time during pregnancy, therefore, this service is critical to the ongoing treatment, care and support for the mother, her family and new born child.

Access to VCT is important in antenatal clinics because there are ways to prevent transmission, such as:

• termination of pregnancy
• antiretroviral therapy (ARV)
• modifying midwifery and obstetrical practices
• modifying infant feeding

However, prevention of MTCT is dependent upon the identification of the HIV-positive woman.

Termination of pregnancy
Where termination of pregnancy is both legal and acceptable, the HIV-positive woman can be offered this option. However, many women learn of their HIV status during pregnancy, and will not be diagnosed in time to be offered termination. If termination is an option, the woman, or preferably the couple, should be provided with the information to make an informed decision without undue influence from health care workers and counsellors.

Antiretroviral therapy (ARV)
A recent study showed that the administration of zidovudine (AZT) during pregnancy, labour, delivery and to the new born reduced the risk of MTCT by 67%. This regimen has become standard practice for HIV-positive women in most industrialized countries and many women are receiving a combination of ARV treatments. This long-course regimen is often not available for women in developing countries because of cost and lack of adequate infrastructure. However, there is a concerted effort to provide short term AZT to all HIV-positive pregnant women. Short course AZT is taken orally from 36 weeks of pregnancy through labour and delivery. This treatment does not prolong the life of the mother, but has been found to be effective in reducing transmission of HIV to the infant.

Nevirapine is a much cheaper antiviral drug than AZT, costing about $4 per mother and baby treated. Recent studies have shown it to be effective in reducing MTCT if a single dose is given to mothers just prior to delivery and to newborns immediately afterwards. In terms of both cost and infrastructure requirements Nevirapine offers a more optimistic and realistic alternative for ARV for developing countries. Many countries are in the process of developing guidelines and an effective infrastructure to support ARV. ARV treatments vary considerably throughout the world and are still in the experimental stages.

Labor and delivery

About 60% of HIV transmission from mother to child is thought to occur around the time of labor and delivery. Several factors have been associated with an increased risk of MTCT at the time of labor and delivery. These include:

The mode of delivery
Vaginal deliveries are more likely to increase the risk of MTCT while elective Caesarian sections have been shown to reduce MTCT. However, the potential benefits have to be balanced against the risk to the mother. Higher rates of post operative death in HIV positive women have been reported, especially from infective complications. In addition, elective Caesarian sections are not available to the vast majority of women worldwide.

Prolonged rupture of membranes
Rupture of membranes for longer than 4 hours has been associated with an increased risk of transmission. Artificial rupture of membranes is practiced routinely in many countries. Membranes should not be ruptured artificially unless there is fetal distress, or abnormal progress in labor.

Episiotomy
Routine episiotomy is not recommended. This procedure should only be used where there are specific obstetric indications. Forceps deliveries and vacuum extractions do not necessarily require an episiotomy.

Intrapartum Haemorrhage
This has been associated with increased MTCT transmission in some studies. Should a blood transfusion be required, there is the added risk of receiving HIV contaminated blood.

Invasive fetal monitoring
Penetrating scalp electrodes may be associated with increased risk of transmission.

Multiple births
The first baby delivered of a multiple pregnancy has a higher rate of HIV infection than the subsequent births.

Universal Precautions
Universal Precautions should be followed in all aspects of care regardless of the HIV status of the woman or the nurse/midwife at the time of labor delivery. Frequent hand washing and glove use (whenever possible) are critical practices in precaution.

Vaginal cleansing
The use of chlorhexidine 0.25% to cleanse the birth canal after each vaginal examination and during labour and delivery has been shown to be effective in reducing MTCT transmission.

Education of traditional birth attendants
Traditional birth attendants (TBAs) play an important role in the labour and delivery of many women worldwide. Educating the TBA about HIV prevention and care and the use of universal precautions is often the responsibility of nurses/midwives. This education should include the use of ARV and STD treatments. They should also be encouraged to avoid traditional practices that may increase the risk of HIV transmission such as the use of vaginal herbal potions and scarification.

Infant feeding

Approximately one third of infants who are infected through MTCT are infected through breast milk. Where alternatives such as replacement feeding exist, HIV positive mothers should avoid or limit breastfeeding their infants. For HIV-negative mothers, breastfeeding still remains the best option.

Where resources are limited, the option of using replacement feeding may be unavailable. Many communities do not have a safe water supply, have limited resources to provide sterile feeding equipment, and have no methods of refrigeration. Replacement feeding is also expensive and many families cannot afford this added expense. In addition, where breast feeding is the cultural norm, seeing a mother artificially feed her infant can lead people to suspect she has AIDS. One must also consider additional problems associated with gastro-intestinal infections, malnutrition, stigma and discrimination. Decisions about whether to breast feed or to provide replacement feeding must be made in light of the above considerations. If replacement feeding is an option, breast milk substitutes include: commercial infant formula, or home-prepared formulas which are made from animal milk, dried milk or evaporated milk with additional ingredients. Once the decision has been made about whether or not to breast feed, then other considerations must be taken into account:

Post-natal care of the HIV-infected mother and her infant

In many instances, the basic post natal care of the HIV-infected woman and her infant will be no different from routine postnatal care. However, the mother (and possibly partner/family) might need additional counselling and support. Such counselling might include decisions on infant feeding (although this decision should have been made in the antenatal period), and advice on birth control. It is important that the woman and her family are involved in a continuum of care, so that comprehensive linking of resources and services can be provided where and when they are most necessary and effective. HIV-infected women are more prone to medical complications such as urinary tract infections, chest infections, episiotomy sepsis, and uterine and Caesarian section wound sepsis.