Almost all organs of the baby develop at the end of first trimester. So baby is probably able to do all the functions except respiration. Human baby probably start doing intellectual function and probably respond emotionally as well.
A baby does not grow in the stomach. It grows in the uterus. The stages are: . First trimester (weeks 1-12) . Second trimester (weeks 13-26) . Third trimester (weeks 27-40)
Pregnancy is broken down into three trimesters. The baby develops most rapidly during the first trimester (weeks 1-13). The baby starts off as a collection of cells that develop into an embryo. At 8 weeks, the embryo is called a fetus because the baby resembles a human. At this time, all major organs and systems have been formed. During the second trimester (weeks 14-26), the organs and systems start to mature. During the third trimester (week 27-40), the baby starts to pack on the pounds.
During the first trimester, most babies weigh less than an ounce as they are still developing their organs and structures. By the second trimester, the average weight increases significantly, with babies typically weighing around 1 to 2 pounds by the end of this period. In the third trimester, the baby's weight can range from about 2 to 7 pounds, as they undergo rapid growth and fat accumulation in preparation for birth. Overall, the average weight at birth is around 5.5 to 8.8 pounds, depending on various factors.
The major organs systems have started developing.
3rd trimester
A baby born at week 26 - the last week of the second trimester would be 14" long and weigh about 1 pound 8 ounces.
During the first trimester of pregnancy, which lasts from week 1 to week 12, key facts include the development of the baby's major organs and body structures, the onset of morning sickness and fatigue for many women, and the increased risk of miscarriage. It is important for pregnant individuals to receive prenatal care, take prenatal vitamins, and avoid harmful substances during this critical period of fetal development.
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.
13 weeks and 3 days are 1 trimester for school
Four weeks along is in the first trimester. The first trimester ranges from week 1 - week 12, or the first three months.
Pregnancy actually begins two weeks before you conceive (when the egg fertilizes the sperm). You generally find out you are pregnant two weeks after you conceive, by this time you would be four weeks pregnant techinally alhthoug a lot of people may consider themselves to be only two weeks pregnant. The first trimester begins at the techinal week 1, before you are actually "pregnant" and have conceived. Weeks 1-12 are the weeks of your first trimester.
First trimester: 0-12 weeks (so 12 total) Second trimester: 13-28 weeks (so 15 weeks total) Third trimester: 29 weeks-40 weeks (so 11 weeks total)