An ultrasound can now reveal the baby’s sex
The baby’s genitals are now formed [1]. Although the boys' testes are still in the abdominal cavity, they already have a penis, prostate, seminal vesicles, and the testes themselves. Girls have noticeable labia, a clitoris, a vagina, a uterus, fallopian tubes, and ovaries.
The baby's body is well formed, though the head might not look that large yet. Their upper and lower extremities are evenly developed, and the ratio in the lengths of the individual parts is correct. The phalanges (bones) of the fingers and toes are formed, and they have developed a fingerprint pattern.
With the growth and development of the muscular system, the baby's movements become more distinct. Under their influence, the cardiovascular system develops and the heart begins pumping more blood.
Sweat glands form and a subcutaneous layer of fat starts to develop, together they will help in thermoregulation when the baby is born.
If your partner is expecting twins
At this time, your expectant partner will begin to feel the babies moving! Yes, a little earlier than single pregnancy moms. After all, twins take up more space than one baby and have slightly less fetal water in their sacs [2].
What we can see on an ultrasound
The ultrasound image shows the baby’s head from above and we can see its diameter. A bright horizontal strip is visible, which divides the brain into the right and left hemispheres, showing the formed bones of the skull.
biparietal size
head
In the following image, the baby is lying on their back, possibly sleeping, pressing their head to their chest. The heart is fully formed; with two chambers visible in the chest cavity.
You can also view the baby’s profile and distinguish the forehead, nose, and tiny lips. The upper and lower jaws are visible, and in between them, you can see the mouth.
head
heart
stomach
