abortion Termination of pregnancy before the fetus is viable and capable of extrauterine existence.

amniocentesis The withdrawal of an amniotic fluid by insertion of a needle through the abdominal and the uterine wall.

amnion A smooth, slippery, glistening innermost membrane that lines the amniotic space.

amenorrhea The cessation of menstruation.

antepartal See prenatal.

attitude The degree of flexion of the fetus body parts (body, head, and extremities) to each other.

ballottement The fetus, when pushed, floats away and then returns to touch the examiner's fingers.

basal body temperature (BBT) A means to identify the time that ovulation occurs.

Bartholin's gland Two, small mucous glands situated on each side of the vaginal opening that secrete small amounts of mucus during intercourse.

breech Delivery of an infant feet or buttocks first.

blastocyst The inner solid mass of cells within the morula.

Braxton-Hick's contractions Painless uterine contractions occurring throughout pregnancy.

broad ligaments Two wing-like structures that extend from the lateral margins of the uterus to the pelvic walls and divide the pelvic cavity into an anterior and posterior compartment.

breast stimulation test (BST) A test that involves stimulation of the nipples (rubbing) which causes the posterior pituitary to release the hormone oxytocin, which in turn, causes contractions.

cardinal movements Movements made by the fetus during the first and second stage of labor.

cervix The narrow, inferior outlet that protrudes into the vagina.

Chadwick's sign Violet tinge of the cervical and vaginal mucous membranes due to the increased vascularity as a result of increased hormones.

chorion The outer fetal membrane that forms a large portion of the connective tissue thickness of the placenta on its fetal side.

chorionic villi Fingerlike tissue projections of chorion on the outer wall of the fertilized egg.

chromosomes Small, threadlike structures within each cell that contain genes which carry genetic instructions.

conception Fertilization; the joining together of the female sex cell and the male sex cell.

conjugate An important diameter of the pelvis, measured from the center of the promontory of the sacrum to the back of the symphysis pubis.

corpus luteum The yellow mass found in the graafian follicle after the ovum has been expelled.

contraction stress test (CST) A test to evaluate the respiratory function in the placenta.

Cowper's glands Two tiny pea-sized glands that are situated on either side of the membranous portion of the urethra inferior to the prostate.

dyspnea Difficult breathing.

EDC Estimated date of confinement.

edema Abnormal, excessive fluid within the body tissues.

embryo The early stage of development of the young of any organism when specific identification is difficult.

endometrium The inner lining of the uterus.

engagement The entrance of the presenting part of the fetus into the true pelvis or the largest diameter of the presenting part into the true pelvis.

epididymis A coiled tube about 20 inches long which serves as a temporary storage site for immature sperm.

estrogen The genetic term for the female sex hormones.

fallopian tubes Oviducts or uterine tubes leading from the uterine cavity towards each ovary.

fertilization The union of the male and female sex cells

fetal Pertaining to or related to the fetus.

fetus The child in utero from about the seventh to ninth week of gestation until birth.

fimbriae Fringes; especially the fingerlike ends of the fallopian tubes.

follicle A pouch-like depression or cavity.

follicle stimulating hormone (FSH) A hormone produced by the anterior pituitary during the first half of the menstrual cycle.

fundus The superior, rounded region above the entrance of the fallopian tubes.

fraternal twins Fetuses that develop from two fertilized oval; also referred to as dizygotic twins. They may be the same or different sex.

gene The smallest unit of inheritance; genes are located on the chromosomes.

genitalia Organs of generation, or reproduction.

gestation The period of intrauterine development from conception through birth; pregnancy.

Goodell's sign Marked softening of the cervix.

graafian follicle A mature, fully developed ovarian cyst containing a ripe ovum.

grandmultipara A woman who has had six or more births past the age of viability.

gravida A pregnant woman; refers to any pregnancy regardless of duration.

Hegar's sign Softening of the lower uterine segment just above the cervix.

hormone A chemical substance produced in an organ, which, being carried to an associated organ by the bloodstream, excites in the later organ a functional activity.

hydatidiform mole An abnormal growth of a fertilized ovum.

hyperemesis gravidarum Severe nausea and vomiting that lasts beyond the fourth month of pregnancy.

identical twins Twins developed from a single fertilized ovum, they are of the same sex.

in utero Within the uterus.

ischial spines Two relatively sharp bony projections protruding into the pelvic outlet from the ischial bones that form the lower lateral border of the pelvis. It is used in determining the progress of the fetus down the birth canal.

ischial tuberosities The major bony sitting support; important in measuring a transverse diameter of the pelvis.

isthmus The portion of the uterus that joins the corpus to the cervix.

labia majora Two fleshy, hair covered folds located on both sides of the perineal midline, extending from the mons veneris almost to the anus in women.

labia minora Two small folds of tissue covering the vestibule located just under the labia major in women.

lactation The production of milk by the mammary glands.

leukorrhea A white or slightly grey discharge from the vagina or cervix.

lie Refers to the position of the spinal column of the fetus in relation to the spinal column of the mother.

lightening The sensation of decreased abdominal distention produced by the descent of the uterus into the pelvic cavity.

linea nigra A black line in the midline of the abdomen that may run from the sternum or umbilicus to the symphysis pubis.

lunar months A period of four weeks (28 days).

luteinizing hormone A hormone produced by the anterior pituitary that stimulates ovulation and the development of the corpus luteum.

mask of pregnancy The brownish hyperpigmentation of the skin over the face and forehead. Also referred to as chloasma.

meiosis The process of cell division that occurs in the maturation of sperm and ova that decreases their number of chromosomes by one half.

menstruation The periodic discharge of blood, mucus, and epithelial cells from the uterus.

menopause The cessation of menstruation.

miscarriage Lay term for spontaneous abortion.

mons pubis The fatty, rounded area overlying the symphysis pubis and covered with thick coarse hair.

Montgomery's glands Small nodules located around the nipples that enlarge during pregnancy and lactation.

morning sickness Refers to nausea and vomiting usually in the morning during the first weeks of pregnancy.

mucous plug A collection of thick mucous that blocks the cervical canal during pregnancy.

multifetal pregnancy Pregnancy involving two or more fetuses.

multigravida A woman who has been pregnant more than once.

multipara A woman who has delivered two or more fetuses past the age of viability.

myometrium The muscle component of the wall of the uterus.