Second trimester

Weeks 14 Thru 16 – Gestational Age (Fetal Age – Weeks 12 Thru 14):

Intestines have returned to his or her abdomen from the umbilical cord.
Urine begins to form and releases into the amniotic fluid
Bone tissue around the head and within arms and legs develops

Red blood cells are forming in your baby's spleen.
You can now find out the babies sex.

Weeks 17 Thru 20 – Gestational Age (Fetal Age – Weeks 15 Thru 18):
Rapid growth is apparent.
Baby's skeleton is developing bones
Scalp hair also is forming

Eyes have begun to face forward and slowly move

The ears are close to reaching their final position.

Skin begins to produce vernix.

Weeks 21 Thru 23 – Gestational Age (Fetal Age – Weeks 19 Thru 21):

Lanugo now covers the fetus’s entire body.
All the components of the eyes are developed. The liver and pancreas are working hard to develop completely.

Weeks 24 Thru 26 – Gestational Age (Fetal Age – Weeks 22 Thru 24)- Beginning The Third Trimester:
The fetus has developed sleeping and waking cycles.

The fetus has a startle reflex, and the air sacs in the lungs have begun formation.
Brain will develop rapidly
The nervous system has developed enough to control some functions.