Question

Fertilisation, Pregnancy and Embryonic Development​

Answer 1

Answer:

Conception occurs when these cells join as the egg is fertilized. Pregnancy begins once the fertilized egg implants in the uterus. The embryo grows and becomes surrounded by structures that provide support and nourishment. Eyes, limbs, and organs appear as the embryo develops into a fetus.

Answer 2

Fertilization, pregnancy and embryo development

Explanation:

• Fertilization can be defined as the fusion of male sperm with the female ovum, which finally leads to the development of zygote .
• Zygote starts dividing into a hollow ball of cells called blastocyst which gets attached to the lining of uterus, leading to pregnancy.
• Blastocyst transforms into gastrula where primary germ layers mark the beginning of embryonic development.
• Germ layers called ectoderm, mesoderm, and endoderm are formed and various organs are formed from these three germ layers.
• Gestation period is the period during which foetus remains inside the uterus.
• Parturition is the process of giving birth to a baby.