2017年1月31日 · Labor is the process by which the fetus and the placenta leave the uterus. Delivery can occur in two ways, vaginally (through the birth canal) or by a cesarean (surgical) …

2017年4月25日 · The first stage of labor happens in two phases: early labor and active labor. Typically, it is the longest stage of the process. During early labor: The opening of the uterus, …

2017年2月13日 · For most women, labor begins sometime between week 37 and week 42 of pregnancy. Labor that occurs before 37 weeks of pregnancy is considered premature, or …

2017年8月7日 · If not, and if the pregnancy is at or near term, the provider will likely induce labor. If a pregnant woman's water breaks before 34 weeks of pregnancy, the woman will be …

2014年3月5日 · Infants born in the 37th and 38th weeks of pregnancy—previously called term but now referred to as “early term”—face more health risks than do those born at 39 or 40 weeks. …

2017年9月1日 · "Labor" and "delivery" describe the process of childbirth. Contractions of the uterus and changes in the cervix (the opening of the uterus) prepare a woman's body to give …

2018年5月16日 · Women who have delivered preterm before, or who have experienced preterm labor before, are considered to be at high risk for preterm labor and birth. 1 Being pregnant …

2020年12月30日 · Preterm labor is labor that begins before 37 weeks of pregnancy. Any infant born before 37 weeks is at an increased risk for health problems, in most cases because …

2017年1月31日 · Pregnancy is a period of up to 41 weeks in which a fetus develops inside a woman’s womb. NICHD conducts and supports research and training to help promote healthy …

2017年2月6日 · Several factors can make a pregnancy high risk, including existing health conditions, the mother’s age, lifestyle, and health issues that happen before or during …