The process of implantation is where an egg attaches to the lining of the uterus, which happens 5 to 7 days after the egg has been fertilized by sperm. In the uterus, the fertilized egg starts growing and gradually doubles.
A monthly guide to your baby fetal development will help you get a better understanding of what to expect in the coming few months, till your little baby is there in your arms-
Baby Fetal Development
For anchoring the embryo, chorionic villi are finger-shaped growths that grow into the uterine wall. The baby is the size of a pea. The umbilical cord and placenta began to form after implantation. They carry away the waste of the baby and provide it with oxygen. To protect the baby from pressure and bumps, it is enclosed in the amniotic sac, which is of fluid.
The baby can now be called a fetus. The internal organs are in place and ready to develop. Women won’t feel anything, but they can see the baby waving and wiggling in an ultrasound scan. Distinct facial features are possessed by an eight-week old fetus. It weighs less than 2grams and is 2centimeters long.
The baby’s legs and arms moving can be seen in an ultrasound now. In the third month, heartbeat can also be detected. At the end of the month, development of other organs including the heart is complete. Gender differentiation at this point is difficult because the sex organs are still developing. The face is formed now, but the muscles in head, limb and trunk are still developing. The baby weighs one ounce and is 3-4 inches long when the third month ends.
Lanugo is the fine hair that covers the transparent, pink skin of the baby. Fingernails can be seen now. Face is developing so eyelashes and eyebrows appear. The baby can hear voices now as buds on the side of the head are forming into the outer ear. Half of the baby is now the head as the tail disappears. The head from the body can be lifted as the neck is long enough.
The whole body is now covered by fine hair called lanugo. Footprints and fingerprints are developed, but eyelashes and eyebrows are still developing.
The baby may suck thumbs and even start swallowing. For skin protection, a lanolin-like covering in white called Vernix appears. The baby can hear as the ears are almost developed. It now weighs ¾ to 1 pounds and is 7-8 inch long.
The baby is now creating its own antibodies as its immune system is developing. A startle and hand grip reflex is developed. Alveoli forms and lungs are developing. The baby fills out and grows and shows what it will be like at birth. The weight is around 1 ½ to 2 ¼ pounds and length is 9-10 inches.
The baby can cry now and open the eyes. It becomes active and movements can be seen by others as well. Bones are developed fully and body fat is developing. Hiccups can also happen. The baby weighs 3 to 3 ½ pounds at the end of the month and is 11 inches long.
Not a lot of development takes place at this stage. Nonetheless, the baby grows and matures for life outside. The baby goes through periods of REM sleep most of the time. The baby is active although there is space constraint. 5 to 6 pounds and 13 inch long are the baby’s measurements now.
The baby prepares for birth in this month, which can be longer than 9 calendar months. The baby will have active periods, but will also rest a lot. In preparation for birth, the baby will be head down. 19 to 21 inch in length and 7 to 8 pounds is the typical measurement of a baby, although it can vary.
Photo Credit: http://www.babycenter.com.au/30-weeks-pregnant