Zygote is formed after the process of fertilisation in which a haploid male gamete (sperm) fuses with a haploid female gamete (egg cell). The single-celled zygote undergoes repeated mitotic divisions to form an embryo.

Colostrum is a nutrient-rich fluid released by female mammals shortly after birth that is rich in immune, development, and tissue-repair factors. It is a complex biological fluid that aids in the newborn's immune system growth.

During pregnancy, the placenta is an organ that grows in your uterus. This structure gives your developing baby oxygen and nutrients while also removing waste from his or her blood. The placenta binds to the uterine wall, and the umbilical cord of your baby emerges from it.