Premature birth is when a baby is born before the 37th week of pregnancy. Premature babies tend to have more health problems than full-term babies (born between 39 and 40 weeks of pregnancy). Progestogens may help prevent premature birth in some women, according to several studies.

Progesterone plays a role in regulating the menstrual cycle; helping eggs fertilize; protecting the fetus during pregnancy and supporting the development of mammary glands during pregnancy,... Therefore, progesterone testing is very important to monitor the health of women and fetuses.