| A | B |
|---|
| Pregnancy | The period during which the a fertilized egg grows and develops into a human inside a mothers body |
| trimester | a period of about 3 months |
| ovum | a womans egg |
| ovulation | once a month a womans egg is released from the ovaries |
| sperm | male cell needed for reproduction |
| conception | sperm and ovum unite; also known as fertilization |
| zygote | fertilized human egg; the zygote stage lasts from conception to 2 weeks |
| embryo | the developing baby from about the third week of pregnancy through the eighth week. |
| fetus | the final stage of pregnancy from the ninth month until birth |
| prenatal development | all development that occurs between conception and birth |
| amniotic fluid | a fluid that cushions the baby against possible injury, allows the baby to move easily and regulates it's temperature |
| amniotic sac | the sac that holds the amniotic fluid |
| umbilical cord | the flexible cord that contains blood vessels and connects the baby to the placenta |
| placenta | a special organ that functions as an interchange between the developing baby and its mother providing nutrients and blood to the fetus |
| lightening | the process or time during late pregnancy when the fetal head begins to descend into the mothers pelvis, resulting in a lessening of pressure in the diaphragm |
| quickening | to move and be felt moving in the womb |
| uterus | a hollow muscular organ in the pelvic cavity of the female, in which the embryo is nourished and develops before birth |
| lanugo | soft prenatal hair, usually shed in the 7th and 8th month |
| vernix caseosa | waxy or cheesy white substance found coating the skin of the newborn humans |
