ANATOMY ch 9 - obstetrics and neonatology

gamete

mature germ cell (sperm or ovum)

fertilization

beginning of pregnancy, when sperm enters ovum

• occurs in fallopian tubes

• aka conception

zygote

cell formed by union of sperm and ovum

embryo

unborn offspring from implant to 8th week of pregnancy

• rapid embryo growth

fetus

unborn offspring from 9th week of pregnancy til birth

gestation

conception to birth ; aka pregnancy

implantation

embedding zygote into uterine lining

• usually 7 days after fertilization and lasts for days

placenta

temporary organ attached to uterine wall that forms during pregnancy

• provides O2 and nutrients to bby

amniotic sac

membranous bag surrounding fetus before delivery

• aka amniotic sac, fetal membrane and bag of water

chorion

outermost layer of amniotic sac

amnion

innermost layer of amniotic sac

amniotic fluid

fluid within the amniotic sac, which surrounds the fetus

umbilicus

navel (belly button); site of attachment of umbilical cord to fetus

striae gravidarum

stretch marks

linea nigra

dark medial line from pubis upward

chloasma

hyperpigmentation of blotchy brown macules, usually evenly distributed over cheeks and forehead