When the sperm meets the egg. The sprem contains the gender in the form of an x or y chromosome
It takes a man and a woman to make any kind of human fetus.
In the fetus, red blood cells are primarily produced in the liver and spleen before the bone marrow becomes the main site of production after birth. This shift occurs during the second trimester of pregnancy.
Yes, hearing is one of the first senses to develop in a fetus, usually by the end of the second trimester of pregnancy. The auditory system begins to function early on, allowing the fetus to hear sounds from the external environment.
No. The sex of human children is determined by the chromosomes carried in the male gamete (sperm).
The placenta begins absorbing nutrients and oxygen from the mother's body during the second trimester of pregnancy. By this time, the placenta is fully developed and effectively facilitates the exchange of substances between the mother and the fetus. This process is crucial for the growth and development of the baby throughout the remainder of the pregnancy.
gender is determined at the moment of conception, however it isn't until around the 16th to the 17th week of pregnancy that the sex of the fetus can be determined by ultasound.
Your fetus' sex is determined at fertilization. However, the external genitalia don't start developing until the 11th week of gestation, but will still not be visible on ultrasound.
the organs grow larger
The baby's gender can usually be determined by ultrasound in the mid to late second trimester of the pregnancy. The baby's gender usually begins to develop during the latter half of the first trimester (about 8 weeks).
3rd trimester
Fingers and toes develop during the first trimester of pregnancy in a human fetus.
the first trimester
No, the heartbeat of a baby in the first trimester does not indicate the baby's gender. The sex of the baby is determined by the chromosomes inherited from the parents. A fetal ultrasound is typically used to determine the baby's gender.
Most often the gender of a fetus is determined by looking at the genitals on an ultrasound. For a more reliable answer, expecting parents can use chorionic villus sampling or amniocentesis. However, a new study has found that a simple, non-invasive blood test will be able to reliably determine the gender of a fetus at 7 weeks. The blood test is currently used in Europe and will probably be available in the US in 2012.
2nd trimester
At the third trimester.
in the first trimester