Chapter 9 Flashcards
(47 cards)
Oocyte
An immature productive egg or ovum
Contained when a female fetus is born
Women release 400-500 ovums
Menarche
The beginning of menstruation during puberty
A girls first period
Follicular phase
The rally period during a woman’s monthly fertility cycle when the pituitary gland secretes follicle-stimulating hormone (FSN) to enhance ov development
Literal phase
The lining of the uterus thickens in preparation for receding a fertilized ovum if conception has occurred
The later period of a woman’s monthly fertility cycle
Seminiferous tubules
Tightly wound microscopic tubes that comprise the testicles in the male, where sperm cells are generated
Zygote
A fertilized ovum (or egg) moving down the Fallopian tube
Contains genetic material from both
Blastocyst
The developing zygote with cells surrounding a fluid-filled core upon entering the uterus and before implanting in the uterine wall
Embryo
A blastocyst that has implanted in the uterine wall
Placenta
An organ that develops on the uterine wall during pregnancy and joins the developing embryo to the mother’s biological systems
Transfers nourishment, oxygen and waste products between the fetus and the mother
Umbilical cord
Consisting of one large vein and two arteries that transport nutrients, oxygen and fetal waste products back and forth between the fetus and the placenta
A structure approximately 22 inches in length
Trimester
One of three periods of about three months that make up the phases of a full-term pregnancy
First trimester
Embryonic period
Fetus
Highest risk of miscarriage
Embryonic period
The initial eight weeks of pregnancy following fertilization
Fetus
An embryo after eight weeks of pregnancy
Second trimester
Pregnancy is firmly established
Quickening
Sex can be determined
Quickening
The first movement of the fetus that is felt by the mother
Third trimester
Fetus taste buds have developed
Fetus rotates to head down position
Fetal lungs develop fully and are ready to breathe air
Ectopic pregnancy (tubal pregnancy)
A pregnancy complication in which a fertilized ovum attaches and begins to grow outside the uterus
most commonly in the Fallopian tube
Miscarriage (spontaneous abortion)
The loss (without any purposeful intervention) of an embryo or fetus during the first 20 weeks of pregnancy
Preterm birth (premature birth )
Birth of an infant less than 37 weeks after conception
Leading cause of fetal death
Birth defect
A physical abnormality or metabolic dysfunction that is present at birth and may result in physical or mental deficits
Teratogen
Any agent that has the potential to cause a fetal abnormality
Ex: drugs , chemicals, metals, microbe
Fetal alcohol spectrum disorders
A variety of disorders than may occur in a person whose mother drank alcohol during pregnancy
Abortion
Termination of a pregnancy
Assumed to be the result of an a voluntary medical procedure as opposed to a miscarriage