Abstract

Prenatal growth leads to the occurrence of a new life. Fr om the moment of conception to birth, a fully formed human being takes place from an embryo. Conception takes place when a sperm cell fertilizes an egg, resulting in the formation of a zygote. The cleavage of zygote result s in the formation of a blastocyst which implants itself into the uterine lining. This implantation behaves as a signal especially for the development of embryo in the beginning stages. The development of an embryo takes p lace particularly during the first trimester, second trimester and third trimester. Factors influencing prenatal growth include genetics, maternal nutrition, maternal health, maternal lifestyle, maternal age, maternal stress, plac ental health, environmental factors, multiple pregnancies and medical interventions. Prenatal growth is influenced by many hormones such as human growth (hGH), tri iodo thyronine (T3) as well as thyroxine (T4), insulin like growth fa ctor (IGF), estrogen as well as testosterone, cortisol, progesterone, placental hormones, corticotropin releasing hormone (CRH), melatonin and prolactin. It is finally concluded that prenatal growth explains particularly abo ut the intricate complexity of lifes beginnings.

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