If a pregnancy was terminated, this heightened the risk of premature and very premature delivery
in subsequent pregnancies.
Those extra milligrams probably would be safe and might be beneficial, he said, but the research indicates that it will not prevent the effects of nicotine in fetal brain development or fetal growth, nor will it prevent the potential for premature delivery
The researchers studied the women's characteristics and type of antiretroviral therapy used, as well as the following outcomes for singleton births: premature and very premature delivery
(at less than 37 and 32 weeks' gestation, respectively), low and very low birth weight (less than 2,500 g and 1,500 g, respectively), possibly and definitely abnormal Apgar scores (less than seven and four, respectively) at one minute and five minutes, and stillbirth.
Specifically, a cervix length of less than 25 millimeters at sixteen to eighteen weeks indicates a risk for premature delivery
Women pregnant with multiples are more likely than those with singletons to suffer premature delivery
, toxemia (a potentially fatal form of high blood pressure), and hemorrhage.
Exposure to this type of noise during pregnancy, the doctor reports, can lead to miscarriage, retardation of fetal growth and reduced birth weight, premature delivery
, and hearing loss by the child, including other complications.
Stacey, who has a rare condition called AIT, a disease which causes the mother's immune system to attack the unborn child, must decide whether to risk a premature delivery
The study also found that premature delivery
, low birth weight and infant mortality rates improved when women participated in long-term residential substance abuse treatment while pregnant.
Spontaneous abortion and premature delivery
are more common for women with SLE than for healthy women.
For instance, women with shortened cervixes may need more prenatal-care visits, or more frequent testing for vaginal infections that could further contribute to premature delivery
, Hayashi said.
In fact, prematurity is a very complex medical issue, and many risk factors for premature delivery
have nothing to do with substance abuse.
Some of the improvement in birth weight seemed to be related to the fact that premature delivery
occurred less often in mothers taking zinc.