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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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MedlinePlus at a Glance

  • Offers information on health topics, human genetics, medical tests, medications, dietary supplements, and healthy recipes.
  • Sourced from more than 1,600 selected organizations.
  • Provides 40,000 links to authoritative health information in English and 18,000 links to information in Spanish.
  • In 2018, 277 million users viewed MedlinePlus more than 700 million times.

Childbirth

When you are ready to have your baby, you'll go through labor. Labor is the process of giving birth. Signs that you might be going into labor include:

  • Contractions that are regular then start to come closer together
  • Leaking fluid or bleeding from the vagina
  • Low, dull backache
  • Abdominal cramps

Call your health care provider if you have any of these signs, even if it is before your due date. Preterm labor can start before 37 completed weeks of pregnancy.

Labor happens in three stages. The first stage begins with contractions. It continues until your cervix has become thinner and dilated (stretched) to about 4 inches wide. The second stage is the active stage, in which you begin to push downward. Crowning is when your baby's scalp comes into view. Shortly afterward, your baby is born. In the third stage, you deliver the placenta. The placenta is the organ that supplied food and oxygen to your baby during pregnancy.

Mothers and babies are monitored closely during labor. Most women are able to have a baby through normal vaginal delivery. If there are complications, the baby may need to be delivered surgically by a Cesarean section.

NIH: National Institute of Child Health and Human Development




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