Pregnancy

Stages and development

Human pregnancy is often grouped into three trimesters that reflect major stages of fetal growth and maternal adaptation. Early development includes fertilization and implantation, followed by organ formation in the first trimester. The second trimester sees rapid growth and increased movement, and the third trimester focuses on maturation and preparation for birth.

Signs, detection, and routine care

Common early signs include missed menstruation, nausea, breast changes, and fatigue, though symptoms vary widely. Pregnancy is detected by urine or blood tests that measure pregnancy hormones and by ultrasound imaging. Prenatal care typically involves regular check-ups, nutritional guidance, screening for infectious or metabolic conditions, and monitoring fetal growth to reduce risks for parent and child.

Multiple pregnancy and complications

Most pregnancies produce a single offspring, but sometimes more than one fetus develops (twins, triplets, etc.). Multiple gestations pose higher risks and often require closer monitoring. Other potential complications include high blood pressure disorders, gestational diabetes, preterm birth, and placental problems; many are manageable with timely care.

History, social aspects, and importance

Pregnancy has shaped cultural practices, medical advances, and public health priorities. Supportive prenatal care, safe childbirth practices, and access to information improve outcomes. Individuals and families make personal and social decisions about family size, birthing options, and postpartum support, reflecting both medical considerations and cultural values.

Further notes

• Female: term used to describe the parent in sexual reproduction for mammals.
• Mammal: class of animals in which pregnancy with live birth (in most species) is typical.
• Unborn baby: common term for the developing offspring inside the uterus.
• Conception: the time of fertilization when pregnancy begins biologically.
• Childbirth: the process of delivering the fetus and placenta from the uterus.
• Humans: species in which typical pregnancy duration and obstetric care are well described.