High-risk pregnancy

Even though high blood pressure can be risky for mother and fetus, many women with high blood pressure have healthy pregnancies and healthy children. Uncontrolled high blood pressure, however, can lead to damage to the mother’s kidneys and increases the risk for low birth weight or preeclampsia.

Polycystic ovary syndrome (PCOS) is a disorder that can interfere with a woman's ability to get and stay pregnant. PCOS may result in higher rates of miscarriage (the spontaneous loss of the fetus before 20 weeks of pregnancy), gestational diabetes, preeclampsia, and premature delivery.

It is important for women with diabetes to manage their blood sugar levels before getting pregnant. High blood sugar levels can cause birth defects during the first few weeks of pregnancy, often before women even know they are pregnant. Controlling blood sugar levels and taking a multivitamin with 400 micrograms of folic acid every day can help reduce this risk.

Women with kidney disease often have difficulty getting pregnant, and any pregnancy is at significant risk for miscarriage. Pregnant women with kidney disease require additional treatments, changes in diet and medication, and frequent visits to their health care provider.

Autoimmune diseases include conditions such as lupus and multiple sclerosis. Some autoimmune diseases can increase a women's risk for problems during pregnancy. For example, lupus can increase the risk for preterm birth and stillbirth. Some women may find that their symptoms improve during pregnancy, while others experience flare ups and other challenges. Certain medications to treat autoimmune diseases may be harmful to the fetus as well.

Uncontrolled thyroid disease, such as an overactive or underactive thyroid can cause problems for the fetus, such as heart failure, poor weight gain, and birth defects.

Several studies have found that women who take drugs that increase the chances of pregnancy are significantly more likely to have pregnancy complications than those who get pregnant without assistance. These complications often involve the placenta (the organ linking the fetus and the mother) and vaginal bleeding.

Obesity can make a pregnancy more difficult, increasing a woman’s chance of developing diabetes during pregnancy, which can contribute to difficult births. On the other hand, some women weigh too little for their own health and the health of their growing fetus. In 2009, the Institute of Medicine updated its recommendations on how much weight to gain during pregnancy. New recommendations issued by the American College of Obstetricians and Gynecologists suggest that overweight and obese women may be able to gain even less than what is recommended and still have a healthy infant.

HIV/AIDS damages cells of the immune system, making it difficult to fight infections and certain cancers. Women can pass the virus to their fetus during pregnancy; transmission also can occur during labor and giving birth or through breastfeeding. Fortunately, effective treatments exist to reduce the spread of HIV from the mother to her fetus, newborn, or infant. Women with very low viral loads may be able to have a vaginal delivery with a low risk of transmission. An option for pregnant women with higher viral loads (measurement of the amount of active HIV in the blood) is a caesarean delivery, which reduces the risk of passing HIV to the infant during labor and delivery. Early and regular prenatal care is important. Women who take medication to treat their HIV and have a cesarean delivery can reduce the risk of transmission to 2%.[2]

Pregnant teens are more likely to develop high blood pressure and anemia (lack of healthy red blood cells), and go into labor earlier than women who are older. Teens also may be exposed to a sexually transmitted disease or infection that could affect their pregnancy. Teens may be less likely to get prenatal care or to make ongoing appointments with health care providers during the pregnancy to evaluate risks, ensure they are staying healthy, and understand what medications and drugs they can use.

Older first-time mothers may have normal pregnancies, but research indicates that these women are at increased risk of having: a cesarean delivery; delivery complications, including excessive bleeding during labor; prolonged labor (lasting more than 20 hours); Labor that does not advance; an infant with a genetic disorder, such as Down syndrome.[2]

Alcohol consumed during pregnancy passes directly to the fetus through the umbilical cord. The Centers for Disease Control and Prevention recommend that women avoid alcoholic beverages during pregnancy or when they are trying to get pregnant. During pregnancy, women who drink are more likely to have a miscarriage or stillbirth. Other risks to the fetus include a higher chance of having birth defects and fetal alcohol spectrum disorder (FASD). FASD is the technical name for the group of fetal disorders that have been associated with drinking alcohol during pregnancy. It causes abnormal facial features, short stature and low body weight, hyperactivity disorder, intellectual disabilities, and vision or hearing problems.

Smoking during pregnancy puts the fetus at risk for preterm birth, certain birth defects, and sudden infant death syndrome (SIDS). Secondhand smoke also puts a woman and her developing fetus at increased risk for health problems.[2]