In the ideal childbirth, labor begins on its own "at term". Complications of pregnancy may include disorders of high blood pressure, gestational diabetes, iron-deficiency anemia, and severe nausea and vomiting. Prenatal care may also include avoiding recreational drugs (including tobacco and alcohol), taking regular exercise, having blood tests, and regular physical examinations. Nutrition during pregnancy is important to ensure healthy growth of the fetus. Prenatal care improves pregnancy outcomes. At 28 weeks, more than 90% of babies can survive outside of the uterus if provided with high-quality medical care, though babies born at this time will likely experience serious health complications such as heart and respiratory problems and long-term intellectual and developmental disabilities. Around the middle of the second trimester, movement of the fetus may be felt. During the first trimester, the possibility of miscarriage (natural death of embryo or fetus) is at its highest. The fertilized egg then travels down the Fallopian tube and attaches to the inside of the uterus, where it begins to form the embryo and placenta. The first trimester includes conception, which is when the sperm fertilizes the egg. Pregnancy is divided into three trimesters of approximately three months each.
Methods of birth control-or, more accurately, contraception-are used to avoid pregnancy. Pregnancy may be confirmed with a pregnancy test. Signs and symptoms of early pregnancy may include missed periods, tender breasts, morning sickness (nausea and vomiting), hunger, implantation bleeding, and frequent urination. ten weeks' gestational age), after which the term fetus is used until birth. An embryo is the term for the developing offspring during the first seven weeks following implantation (i.e. Pregnancy is "the presence of an implanted human embryo or fetus in the uterus" implantation occurs on average 8–9 days after fertilization. Counting by fertilization age, the length is about 38 weeks. Childbirth typically occurs around 40 weeks from the start of the last menstrual period (LMP), a span known as the gestational age. A pregnancy may end in a live birth, a miscarriage, an induced abortion, or a stillbirth. Pregnancy usually occurs by sexual intercourse, but can also occur through assisted reproductive technology procedures. A multiple pregnancy involves more than one offspring, such as with twins. Pregnancy is the time during which one or more offspring develops ( gestates) inside a woman's uterus (womb). Sexual intercourse, assisted reproductive technology īirth control (including emergency contraception) ~40 weeks from the last menstrual period (38 weeks after conception) Miscarriage, high blood pressure of pregnancy, gestational diabetes, iron-deficiency anemia, severe nausea and vomiting Missed periods, tender breasts, nausea and vomiting, hunger, frequent urination
A woman in the third trimester of pregnancy
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