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Uterine fibroids during pregnancy do not appear to result in undersized newborns, suggests a study by researchers at the National Institutes of Health. The finding allays concerns from previous studies that fibroids might result in smaller-than-normal infants. In fact, the study found that infants born to mothers with fibroids had slightly larger head, arm and thigh circumferences, though not to the extent that they would interfere with birth. The researchers also confirmed prior results suggesting a link between fibroids and increased risk for preterm birth.

Researchers know that children born to mothers who have depression in pregnancy are at risk for developmental delays but haven’t known why. Now, a National Institutes of Health study suggests that depression persisting after pregnancy and reduced breastfeeding may account for at least part of the increased risk. Based on their results, researchers conclude that physicians may be able to reduce this risk by offering treatment for depression both during and after pregnancy and by counseling new mothers on how to breastfeed successfully.

Read about NICHD’s research findings and activities from 2022.

Exposure to caffeine in the womb, even in small amounts, may lead to shorter height in childhood, suggests an analysis by NICHD researchers. Children of women with low caffeine intake during pregnancy were slightly shorter than their peers born to women who consumed no caffeine while pregnant. The gaps in height widened between ages 4 and 8 years.

Maternal obesity before pregnancy may increase the risk of asthma in early childhood, suggests a study by the National Institutes of Health. Children born to mothers with obesity were more likely than those born to mothers without obesity to have persistent wheezing, an indication of asthma.

Children conceived with infertility treatment may have a higher risk for asthma and allergies, suggests a study by researchers at the National Institutes of Health.

Children who were first given juice before they were six months old were more likely to have overweight or obesity in early and mid-childhood, compared to kids who were given juice at one year old or later, according to a study by researchers at the National Institutes of Health. The finding provides additional support for a theory that giving young children sweet foods or drinks may foster a preference for sweet tastes that can lead to weight gain later in childhood.

On average, scores on development tests were lower for infants born earlier in the range of a term pregnancy—from 37 to 41 weeks—than for those born later in the range, suggests a study by researchers at the National Institutes of Health. The slight difference in scores, first apparent at eight months, persisted through age seven. The findings may have implications for current practice guidelines recommending induction of labor for non-medical reasons at the 39th week of pregnancy.

Read about NICHD’s research findings and activities from 2021.

Dr. Grewal has been acting director of the division since February 2020.

Young children with a history of eating problems in the first three years of life were more likely to receive low scores on assessments of child development, according to a study by researchers at the National Institutes of Health. The findings suggest that children with multiple eating problems—frequent crying during meals, pushing food away, gagging and others—may benefit from screening for developmental delay.

Children who were given juice before they were 6 months old drank more juice and soda, and less water, by early and mid-childhood, on average, than children first given juice at or after 12 months, according to a study conducted by researchers at the National Institutes of Health. The findings support a theory that giving children sweet foods and drinks at an early age fosters a preference for sweet tastes that persists into childhood, increasing the risk for childhood weight gain and tooth cavities.

A healthy diet around the time of conception through the second trimester may reduce the risk of several common pregnancy complications, suggests a study by researchers at the National Institutes of Health.

NICHD Director Dr. Diana Bianchi is joined by NIH Office of Research on Women’s Health Director Dr. Janine Clayton in assessing the growing maternal health crisis in the United States and describing NIH’s efforts to address it.

Pregnant women who consumed the caffeine equivalent of as little as half a cup of coffee a day on average had slightly smaller babies than pregnant women who did not consume caffeinated beverages, according to a study by researchers at the National Institutes of Health.

Contrary to previous findings, low-dose aspirin therapy before conception and during early pregnancy may increase pregnancy chances and live births among women who have experienced one or two prior miscarriages, suggests a study by researchers at the National Institutes of Health. Rather than looking solely at the difference in pregnancy rates between women who were given aspirin and those receiving a placebo, the study also accounted for differences in total aspirin use between women who deviated from the daily regimen and those who adhered to it.

Women who use marijuana could have a more difficult time conceiving a child than women who do not use marijuana, suggests a study by researchers at the National Institutes of Health.

Women with asthma are more likely than normal to gain weight during pregnancy and to retain weight 3 months after giving birth, suggests a National Institutes of Health study. On average, women with asthma gained 3.1 kg (just under 7 lbs) more after a full-term pregnancy than women without asthma. Among women with asthma, weight gain was greater with obesity. Weight gain was also greater with more severe asthma and with asthma triggered by exercise. The study authors suggest that their findings underscore the importance of pre-pregnancy counseling for women with asthma on the need to achieve and maintain a healthy body weight.

Opioid use among women trying to conceive may be associated with a lower chance of pregnancy, suggests a National Institutes of Health study. Moreover, opioid use in early pregnancy may be associated with a greater chance of pregnancy loss.

New tools estimate fetal growth percentiles and velocity, and they account for racial and ethnic variations.