Prenatal Terms

Pregnancy and prenatal terms (Chapter 4)
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Pregnancy
Condition in a female of having a developing embryo and fetus in her uterus for about 40 weeks.
Trimester
A period of three or about three months; especially: any of three periods of approximately three months each into which a human pregnancy is divided.
Ovum
The female reproductive cell.
Ovulation
The process of releasing a mature ovum into the fallopian tube each month.
Conception
Beginning; forming of an idea; fertilization; V. conceive: form an idea in the mind; devise; become pregnant; inception.
Zygote
The fertilized egg; it enters a 2-week period of rapid cell division and develops into an embryo.
Embryo
The developing human organism from about 2 weeks after fertilization through the second month.
Fetus
The developing human organism from 9 weeks after conception to birth.
Prenatal Development
Period of development that begins with fertilization, or conception, and ends with birth, The development of a zygote, embryo, and fetus before birth.
Amniotic Fluid
Fluid within the amniotic sac that surrounds and protects the fetus.
Placenta
The vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus.
Lightening
Descent of the uterus into the pelvic cavity that occurs late in pregnancy.
Quickening
The stage of pregnancy at which the mother first feels movements of the fetus.
Uterus
A hollow muscular organ in the pelvic cavity of females.
Lanugo
The fine downy hair covering a human fetus.
Vernix Caseosa
At birth the baby's skin is covered w/ cheese like substance (it protects the baby's skin from amniotic fluid).
Sperm
A male reproductive cell; a spermatozoon.
Nausea
"Morning sickness" associated with pregnancy.
EDD
Etimated date of delivery.
Ultrasound
Using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram).
Amenorrhea
Absence or suppression of normal menstrual flow.
Independent adoption
An adoption in which a person works out the details between the birth and adopting parents.
Infertility
The inability to conceive a child.
Agency adoption
A type of adoption in which birthparents & adoptive parents arrange an adoption through a state-licenses adoption agency .
Closed adoption
The adoptive and biological families have no communication and do not know one another's identities
Open adoption
Involves some direct contact between the biological and adoptive parents ranging from one meeting before the child is born to life long friendship.
Amniocentesis
Extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities.
Obstetrician
A doctor who specializes in pregnancy, labor, and delivery.
Umbilical cord
A structure with blood vessels that connect the embryo to the placenta.
Congenital disabilities
Conditions existing from birth that limit a person's ability to use his or her body or mind.
Genes
The basic building blocks of heredity.
Amniotic sac
A fluid-filled sac that cushions and protects a developing embryo and fetus in the uterus.
Chorion
Outermost layer of the two membranes surrounding the embryo; it forms the fetal part of the placenta.
Multiple pregnancy
Two or more babies developing in the same pregnancy.
Identical birth
Derived from a single egg or ovum (of twins).
Fraternal birth
Derived from two separate fertilized ova (of twins).
Mixed type birth
Derived from two separate fertilized ova (of twins) and can be both sexes.
Germinal stage
The first phase of prenatal development, encompassing the first two weeks after conception.
Fetal stage
The third stage of prenatal development, lasting from two months through birth.
Embryonic stage
The second stage of prenatal development, lasting from two weeks until the end of the second month.

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