Baby Month by Month – Pregnancy Stages

The Pregnancy stages diagrams below shows the development of the baby month by month in woman’s uterus. Month 1 marks the beginning of the first trimester when the ovulation and conception take place. During week 4, some pregnancy tests may detect conception. At this point, the embryo has just two cells. During the second month of pregnancy, women often feel fatique, morning sickness, hormonal fluctuations and other pregnancy-related symptoms The baby’s heart is beating and the brain is forming. During month 3, the embryo becomes a fetus and is about the size of a plum.

During the second trimester, starting month 4, the baby’s bones are hardening and the fetus is about 5 inches long and starts to resemble a human being as seen in the below diagram. Month 5, baby starts to kick and is developing hearing.

During the third trimester, the baby is fully forming with brain processing sights and sounds. The fetus is about 13 inches long. By month 8, the baby is fully formed and is increasing in weight. Baby’s lungs are almost fully developed. By month 9, the baby is ready to come out and meet the world! The month-by-month baby diagram shows the development of a baby and growth of mother’s belly.


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