FETUS DEVELOPMENT

By: Malyssa Johnson, Ayanna Taylor

TRIMESTER 1!!!!

3 weeks after fertilization the outer layer forms the embryo's skin and nervous system

The inner layer forms the digestive tract and lungs

The middle forms other organs

A fluid filled sac forms to protect the embryo from physical impact

TRIMESTER 1 CONT..

Then the yolk sac membrane forms gametes

The placentas develops and surrounds the embryo

Lastly by the end of the trimester the fetus has all its organs and can move its body features

SEE!!!!

TRIMESTER 2

The fetus increases in length and weighs .5 kg

Fetus now has a face

The fetal heartbeat is now easily detected

Fetus starts to fill up much of the space in the uterus

TRIMESTER 3

Bones are fully developed

Fetus stores its own calcium and iron

Fetus descendes in the head down position

Fetus gains more weight

TRIMESTER 3 CONT.….

There is a decline in fetal movement

All organs are fully developed

In weeks 37-40 fetus should weigh about 6-10 pounds