Prenatal And Conception Of Birth Essay

1727 Words Oct 21st, 2015 7 Pages
Prenatal (Conception to birth):

Conception is the process of fertilisation, in which the male sperm cell combines with female egg to produce a viable embryo. The single celled embryo then replicates, via mitosis, to begin the formation of a multi-celled organism. The cells then undergoes cellular differentiation, through switching different genes on and off, to specialise in a specific function. The average duration of a pregnancy is 37 to 42 weeks, which is split into three distinct trimesters. The first trimester spans the period of 0 to 13 weeks, in which the baby 's biological development occurs. During the first period, the baby 's skeletal and bodily structure begins to form, with nerve cells and synapses showing the origins of the brain. The child is beginning to develop self awareness, with clenching fingers, toes, and eyes. Other main organs are also developing, such as the liver, bladder, heart, spinal cord, and intestines. The second trimester encompasses weeks 14 to 26, and is often referred to as the ‘golden period’ as most pregnancy related symptoms, such as morning sickness and migraines, decrease. The baby begins to develop a network of nerves within their ears, reacting to sound stimuli, such as the mother 's voice. Other vital developments also occur during this trimester include; eye movement, and small ‘practice’ breaths. The third trimester involves weeks 27 to 40 of the pregnancy, and is the last period of the pregnancy before birthing. During this…

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