Pregnancy overview

Question 1

How long does pregnancy last?

Answer 1

38 weeks

Question 2

Fertilization

Answer 2

When genetic material from a haploid sperm and a haploid ovum merge into one diploid nucleus

Question 3

where does fertiliation of ovum occur?

Answer 3

about 1/3 way down a uternine tube within 12-24 hours of ovulation

Question 4

What is a fertilized ovum called?

Answer 4

a zygote

Question 5

identical (monozygotic) twins

Answer 5

when one single ovum spits

-have same exact genetic material

-always same sex

Question 6

Fraternal (dizyotic twins)

Answer 6

from 2 eggs and 2 sperm

-can be different sex

Question 7

hatching…

Answer 7

zygote becomes blastocyst

Question 8

______ cells become the embryo

Answer 8

Embroylast

Question 9

______ cells become the placenta

Answer 9

trophoblast

Question 10

implantation

Answer 10

-attatchment of a blastocyst to endometrium

-occurs 7-8 days after fertilization

Question 11

Full term is considered _____ weeks.
But baby is fully ready at _____ weeks.

Answer 11

full term is 40 weeks

baby is fully ready at 36 weeks

Question 12

first trimester

Answer 12

-0 to 3 months
-first two months is called the EMBRIONYIC period where embryo is developed

-placenta is functioning by end of first trimester

Question 13

when does the amnion typically develop?

Answer 13

by day 8 after fertilization

Question 14

Placenta

*4 functions

Answer 14

-allows for 02 and nutrients to diffus into fetal blood from moms blood. Co2 and waste from babies blood goes to moms blood

-provides protection (most microorganisms can’t cross it)

-stores nutrients

-produces several hormones that are needed for pregnancy

Question 15

umbilical cord

Answer 15

-Vascular connection between placenta and fetus

Question 16

umbilical cord vessles

has two arteries that carry ______ blood to placenta.

has one umbilical vein that carries _______ blood to fetus.

Answer 16

1. has two arteries that carry deoxygenated blood from the fetus to the placenta
2. Has one umbilical vein that carries oxygenated blood to the fetus

Question 17

Second trimester

Answer 17

-4 to 6 moths

-continued development of organ systems

-by 6th month the fetus looks like a human

Question 18

third trimester

Answer 18

• from month 7 to 9

-rapid fetal growth and adipose tissue deposition

-most major organs are functional by month 7

Question 19

At what month does a baby have a good chance of survival?

Answer 19

SEVEN (7) months!!!