1. The spinal cord, brain, heart, and lungs grow and develop rapidly during the first trimester. All major systems and organs begin to form. The neural tube (which becomes the brain and spinal cord) develops first. The Nervous system. This is one of the first things to develop. It includes the formation of the baby’s brain, spinal cord, and nerves. However the question asks which is FULLY FUNCTIONAL during the first trimester, and that would be the Heart.
2. Attend regular prenatal Checkups would be the right answer. High-fat meals don't necessarily help the baby's formation, and gaining little weight could potentially be dangerous since this is a period where the mother has to feed the baby with her body, Avoiding moderate physical activities doesn't really apply, mother's need to stay active during pregnancy, strenuous activities are not recommended.
3. Teen mothers are at a disadvantage that could affect lifetime earning potential.
(Since most teen mothers are single and cannot afford caregivers for their children, they are at a severe disadvantage for obtaining a job and spending time away from home. They may be capable of earning a job and keeping it if they didn't also have to take care of their children at the same time.)
4. Early parenthood makes it more difficult to succeed academically.
5. Every 28 days or so, one mature egg is released from the ovary. This is called ovulation. After the egg is released, it moves into the fallopian tube where it stays for about 24 hours. If the egg is not fertilized during that time, the egg disintegrates (breaks down) and menstruation (your period) begins 2 weeks later. So the answer is: It is shed from the uterus during menstruation.
6. During the first trimester (Umbilical cord: A cord that connects the developing baby to the mother in utero. The umbilical cord attaches to the baby at the abdomen and to the mother at the placenta. The cord forms during the fifth week of gestation)
Hope this helps!
