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  2. Pregnancy occurs when a sperm fertilizes an egg after it’s released from the ovary during ovulation. The fertilized egg then travels down into the uterus, where implantation occurs. A successful...

  3. Pregnancy is an exciting time. Knowing that you are doing all you can to stay healthy during pregnancy and give your baby a healthy start in life will help you to have peace of mind. Learn more Before Pregnancy Find tips to get ready for pregnancy. During Pregnancy Learn how to give your baby a healthy start in life. After the Baby Arrives

  4. Symptoms of pregnancy: What happens first - Mayo Clinic

    The most common early signs and symptoms of pregnancy might include: Missed period. If you're in your childbearing years and a week or more has passed without the start of an expected menstrual cycle, you might be pregnant. However, this symptom can be misleading if you have an irregular menstrual cycle. Tender, swollen breasts.

  5. About Pregnancy | NICHD - Eunice Kennedy Shriver National...

    Pregnancy is the term used to describe the period in which a fetus develops inside a woman's womb or uterus. Pregnancy usually lasts about 40 weeks, or just over 9 months, as measured from the last menstrual period to delivery. Health care providers refer to three segments of pregnancy, called trimesters. The major events in each trimester are described below. 1.

  6. Stages of pregnancy | Office on Women's Health

    Pregnancy lasts about 40 weeks, counting from the first day of your last normal period. The weeks are grouped into three trimesters. Find out what's happening with you and your baby in these three stages. Expand All First trimester (week 1–week 12) Second trimester (week 13–week 28) Third trimester (week 29–week 40) Your developing baby

  7. pregnancy, process and series of changes that take place in a woman’s organs and tissues as a result of a developing fetus. The entire process from fertilization to birth takes an average of 266–270 days, or about nine months. (For pregnancies other than those in humans, see gestation .) The normal events of pregnancy Initiation of pregnancy

  8. Your Body. From the first trimester to delivery, this is what you'll want to know about every symptom and change your body may go through, and what (if anything) you can do about it. Early Signs of Pregnancy Pregnancy Week by Week Rib Pain During Pregnancy Pregnancy Symptoms Pregnancy Sleep Labor & Delivery Birth Stories.

  9. Pregnancy | Office on Women's Health

    Pregnancy Pregnancy Get answers to all of your pregnancy questions and learn what you can do before, during, and after pregnancy to give your baby a heathy start to life. Before you get pregnant Preconception health Trying to conceive View more You're pregnant: Now what? Stages of pregnancy Prenatal care and tests View more Getting ready for baby

  10. Pregnancy due date calculator - Mayo Clinic

    To calculate your pregnancy due date, your health care provider will use the date your last period started, add seven days and count back three months. He or she could also simply count ahead 40 weeks from the start of your last period. When your baby arrives, it will have been about 38 weeks since he or she was conceived — but your pregnancy will have officially lasted 40 weeks.

  11. Pregnancy - Wikipedia

    Pregnancy is the time during which one or more offspring develops inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins. Pregnancy usually occurs by sexual intercourse, but can also occur through assisted reproductive technology procedures.