ANATOMY

Detailed explanation-1: -This time is divided into three stages, called trimesters. Each trimester is a set of about three months. Your healthcare provider will probably talk to you about fetal development in terms of weeks.

Detailed explanation-2: -Topic: Embryogenesis. The early stages of embryonic development, such as fertilization, cleavage, blastula formation, gastrulation, and neurulation, are crucial for ensuring the fitness of the organism. Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote.

Detailed explanation-3: -After conception, your baby begins a period of dramatic change known as the embryonic stage. This stage runs from the 5th through the 10th week of pregnancy.

Detailed explanation-4: -The Embryonic Period (Weeks 3-8) The embryonic period begins once the zygote is implanted in the uterine wall. It lasts from the third through the eighth week after conception. Upon implantation, this multi-cellular organism is called an embryo.

Detailed explanation-5: -The correct sequence in development is Fertilization → Zygote → Cleavage → Morula → Blastula → Gastrula.