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After about ten weeks of gestational age, the embryo becomes known as a fetus. Relative size in 1st month simplified illustration Relative size in 3rd month simplified illustration Relative size in 5th month simplified illustration Relative size in 9th month simplified illustration Maternal changes Main article: Maternal physiological changes in pregnancy Breast changes as seen during pregnancy. During pregnancy, the woman undergoes many physiological changes, which are entirely normal, including behavioralcardiovascularhematologicmetabolicrenaland respiratory changes.

At the beginning of the fetal stage, the risk of miscarriage decreases sharply. Increases in blood sugar, breathing, and cardiac output are all required.

Electrical brain activity is first detected between the fifth and sixth week of gestation. Many symptoms and discomforts of pregnancy like nausea and tender breasts appear in the first trimester.

It is considered primitive neural activity rather than the beginning of conscious thought. Although the breasts have been developing internally since the beginning of the pregnancy, most of the visible changes appear after this point.

The rule estimates the expected date Crying stop anal fuck delivery EDD by adding a year, subtracting three months, and adding fuvk days to the origin of fjck age.

Most women feel more energized in this period, and begin to put on weight as the symptoms of morning sickness subside and eventually fade away.

Development of embryo and wnal The initial stages dtop human embryogenesis The sperm and the egg cell, which has been released from one of the female's two ovariesunite in one of the two fallopian tubes.

The fertilized egg, known as a zygotethen moves toward the uterus, a journey that can take up to a week to complete.

Cell division begins approximately 24 to 36 hours after the male and female cells unite.

Cell division continues at a rapid rate and the cells then develop into what is known as a blastocyst.

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