BIOL 224 Lab 16: Gestation and Contraception

sperm

head of sperm

top

neck of sperm

B

middle piece of sperm

C

tail of sperm

D

oocyte

The purple middle circle

secondary oocyte

Once the egg leaves the ovary and becomes fertilized in uterine tube.

corona radiate

outer portion of secondary oocyte

corpus luteum

5

blastomere

from 2-cell stage to ball of cell stage

= a cell

morula

solid ball of blastomeres

blastocyst

the whole ball structure

blastocoele

SPACE

trophoblast

"epithelium" outer layer of blastocyst

inner cell mass

blue portion

first 13 weeks

- rudimentary organ systems have formed.

- fetus is approx 3 inches long

fetus weighs 0.5 lbs.

first trimester

Weeks 14-26

- fetal movements begins around 16-20 weeks

- fetus is approximately 9 inches and 1.4 lbs.

- eyelids open

second trimester

weeks 27-40

- Average 14 inches and 7lbs

third trimester

born prior to 37 weeks

pre-term

born between 37 and 40 weeks

Term

born at greater than 40 weeks

post-term

yolk sac

sac

placenta

red

umbilical cord

3

umbilical arteries

In reference to child, fetus does not pump their own blood. THESE ARE DEOXYGENATED, move away from baby. (Two vessels)

umbilical vein

ARE OXYGENATED, and move towards baby. (One vessel)

amniotic cavity

space around baby

5

amnion

first innermost layer

chorion

2nd layer (more superficial) surrounding baby

chorionic villi

branching in placenta

decidua parietalis

B

decidua basalis

child and parent

male condom

female condom

diaphragm

cervical cap

sponge contraception

copper intrauterine device

spermicide

non-hormonal methods of contraception

oral contraceptives

injection

patch

progestin implant

vaginal ring

hormonal intrauterine device

hormonal methods of contraception

vasectomy

tubal ligation

intra-uterine tube coil placement

permanent methods of contraception

decidua capsularis

C

zygote

fertilized egg