Normal number of chromosomes in each mature sperm or ovum

Normal number of chromosomes in nonreproductive cells

Cell division in sex cells

Cell division in non-sex cells to allow growth and replacement of cells

Formation of spermatozoa

Formation of ova

An ovum or spermatozoon

Spermatogenesis results in the formation of how many sperm from each immature primary spermatocyte?

Each sperm contains___ autosomes and an____ sex chromosome.

A sperm can survive up to ___ days after ejaculation

An ovum survives about____ hours after ovulation

If the ovum is fertilized by a sperm bearing Y chromosome, the baby will be a ____

If the ovum is fertilized by a sperm bearing X chromosome, the baby will be a ____

Fertilization usually occurs in the ________ _________

The fertilized ovum usually implants in the _____ section of the_______uterus.

Inner fetal membrane that envelops the embryo and fetus

Outer fetal membrane that envelops the amnion and embryo/fetus

Solid cluster of cells that is approximately the same size as the zygote

Projections on the outer part of fetal side of the placenta that extend into the decidua basalis

Prenatal development from the ninth week after fertilization until birth

Uterine lining after implantation that gives rise to the maternal side of the placenta

Zygote containing an inner cell mass that will develop into the embryo

Cell formed by union of a sperm and ovum

The volume of amniotic fluid steadily increases from____ at 10 weeks of pregnancy to ___ at 20 weeks.

The normal amount of amniotic fluid near the end of pregnancy is about___ mL.

Red blood cells are formed by the_____ _____ for the first six weeks after gestation and then formed by the____and____ , and finally the____ ____.

The umbilical cord should have___vein(s)and___artery(ies)

Basic structure of all systems established

Possible to monitor fetal status with kick counts

Fetal eyes open

Fetus now considered full term

Tubular heart begins beating; earliest evidence of brain and spinal cord

External genitalia may be determined by ultrasound

Extremities will move in response to external stimuli

Heart has all four chambers

Hereditary or genetic traits are passed from one generation to the next within the

After six weeks gestation, fetal red blood cells are manufactured in the

Which is the outer fetal membrane?

The primary function of the Wharton's jelly is to

Most fetal blood bypasses circulation to the lungs by way of the:

The fetal circulatory structure that carries blood with the lowest oxygen saturation is the

After fertilization, the zygote grows by

The primary purpose of amniotic fluid is to

Fetal waste products are disposed of by the

Inadequate progesterone is likely to result in

Fraternal (dizygotic) twins result when

The sex of identical (monozygotic) twins