Datc Nrsg 1022 Reproduction/fetal Development

Front 1

Foramen Ovale

Back 1

The opening between the two atria of the fetal heart; it permits blood to flow from the right atrium to the left atrium.

Front 2

Ductus Venosus

Back 2

The smaller, shorter, and posterior of two branches into which the umbilical vein divides after entering the abdomen of the fetus.

Front 3

Ductus Arteriousus

Back 3

In the fetus, a blood vessel connecting the main pulmonary artery and the aortic arch.

Front 4

Climacteric

Back 4

The menopause that marks the cessation of a woman's reproductive ability. It is characterized by the decline in ovarian function and the loss of estrogen and progesterone production

Front 5

Endometrium

Back 5

the 3rd uterine layer, composed of 3 layers, 2 are shed with each menses

Front 6

Gametes

Back 6

A mature male or female reproductive cell; a germ cell (Spermatozoon or ovum), haploid cell

Front 7

Myometrium

Back 7

The middle layer, composed of 3 layers of smooth muscle that extend in 3 directions (longitudinal, transverse, and oblique)

Front 8

Seminiferous Tubules

Back 8

the tubes within the testis where sperm are made, the tubes contain spermatogonia (sperm-genertating) cells.

Front 9

Amnion

Back 9

thick membrane that forms the amniotic sac that surrounds the embryo and fetus.

Front 10

Chorion

Back 10

thick outer membrane that forms first and housed and protects the amnion, embryo and yolk sac.

Front 11

Dizygotic

Back 11

Fraternal twins that develop from 2 zygotes and it could be same or different genders.

Front 12

Embryo

Back 12

The stage of prenatal development between fertilized ovum and fetus. This stage is 3rd to the 8th week.

Front 13

Gametogenisis

Back 13

the process in which germ cells (gametes) are produced. These cells are considered haploid.

Front 14

Morula

Back 14

3 to 4 days after fertilization the zygote has divided into a bundle of cells, approximately 16 cells.

Front 15

Wharton's Jelly

Back 15

The gelatinous intercellular connective tissue that surrounds the 2 umbilical arteries and 1 vein within the umbilical cord; it consists of collagen, mucin, and hyaluronic acid.

Front 16

Mitosis

Back 16

process of replication; production of cells which are exact copies of the original cell; makes growth and development possible (diploid)

Front 17

Chorionic Villi

Back 17

The vascular projections from the chorion, which will form the fetal portion of the placenta; formed by trophoblast cells; absorb nutritive materials for fetal growth.

Front 18

Corpus Luteum

Back 18

The small yellow endocrine structure that is the remainder of the ovarian follicle after ovulation, this keeps levels of progesterone and estrogen high until the placenta has sufficiently developed to assume that function.

Front 19

Epididymis

Back 19

Two tightly coiled tubes postioned on top of each testis; stores maturing sperm cells and convey sperm to the vas deferens/ductus deferens

Front 20

Menarche

Back 20

The initial menstrual period, normally occurring between the 9th and 17th year. Beginning of the menstrual cycle

Front 21

Ovulation

Back 21

after maturation of the ovum, LH (lutenizing hormone) stimulates the rupture of the ovum from the ovary.

Front 22

Vas Deferens

Back 22

tubes that extend beyond the epididymis through the inguinal canal, into the abdomen, over and behing the bladder; serves as an excretory duct for seminal fluid, connects the epididymis with the ejaculatory duct.

Front 23

Meiosis

Back 23

process of replication of ova and sperm; cell is haploid (only contains half of the number of chromosomes of parent cell)

Front 24

Cleavage

Back 24

Division of a fertilized egg into many smaller cells or blastomeres.

Front 25

Ectopic Pregnancy

Back 25

Fertilization of the egg outside the uterus. Egg develops anywhere other than the uterus or falopian tubes.

Front 26

Fetus

Back 26

The developing human, in utero, after completion of the eight gestational week. Before that time it is called an embryo

Front 27

Monozygotic

Back 27

Originating from a single fertilized ovum, said of identical twins.

Front 28

Teratogen

Back 28

Anything that adversely affects normal cellular development int he embryo or fetus. (chemicals, therapeutic and illicit drugs, radiation, intrauteral viral infections)

Front 29

Zygote

Back 29

The cell produced by the union of two gametes; the fertilized ovum

Front 30

Blastocyst

Back 30

In embryo development, the stage that follows the morula. It consists of an outer layer, or trophoblast, and an inner cell mass, from which the embryo will develop. At this stage, implantation in the endometrium occurs.

Front 31

Decidua

Back 31

After implantation, the endometrium lining the uterus is termed this.

Front 32

T O R C H

Back 32

Infections that are harmful to the fetus

Toxoplasmosis
Other infections
Rubella virus
Cytomegalovirus
Herpes simplex virus

Front 33

2 Weeks

Back 33

2mm Crown to rump
Blastocyst implanted int he uterus

Front 34

4 weeks

Back 34

0.4 g 4 mm
Embyro is curved, tall prominent. Upper limb buds and otic pits present. Heart prominence evident

Front 35

8 Weeks

Back 35

2 g, 3 cm
Head rounded with human characteristics. Unable to determine sex. Intestines still present in umbilical cord. Ovaries and testes distinguishable

Front 36

12 Weeks

Back 36

19 g, 8 cm
Resembles human being, with disproportionately large head. Eyes fused. Skin pink and delicate. Upper limbs almost reached final length. Intestines in the stomach. Sex distinguishable externally.

Front 37

16 Weeks

Back 37

100 g, 13.5 cm
Scalp hair appears. External ears present. Lower limbs well developed. Arm to leg ratio proportionate. Fetus active.

Front 38

20 Weeks

Back 38

300 g, 18.5 cm
Head and body hair (lanugo) present. Vernix covers skin. Quickening felt by the woman.

Front 39

24 Weeks

Back 39

600 g, 23 cm
Skin reddish and wrinkled. Some subcutaneous fat present. Some respiratory-like movements. Fingernails present. Lean body.

Front 40

28 Weeks

Back 40

1100 g, 27 cm
Eyes open with eyelashes present. Much hair present. Skin slightly wrinkled, more fat now present

Front 41

32 Weeks

Back 41

1800 g, 31 cm
Skin is smooth, increase in weight gain more than length. Toenails present. Testes descending

Front 42

36 weeks

Back 42

2200 g, 34 cm
Skin pale, body plump, Body lanugo almost gone, Able to flex arm and form grasp. Umbilicus in center of body. Testes in inguinal canal, scrotum small with few rugae.
Some sole creases present.

Front 43

40 Weeks

Back 43

3000+ g, 40 cm
Skin smooth and pink. Lanugo on upper back and shoulders. Ear lobes formed and firm. Chest prominent and breasts often protrude slightly. Testes with well defined rugae. Labia majora well developed. Creases cover soles of feet.