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Stages of Pregnancy, 1st, 2nd, 3rd Trimester

Pregnancy Development Stages

Ovulation & Meaning

Ovulation is the process in which a mature egg is released from the ovary. After it's released, the egg moves down the fallopian tube and stays there for 12 to 24 hours, where it can be fertilized.

Definition of Conception & Meaning

The definition of conception is the process of becoming pregnant or the origin of anything.
What is conception mean in pregnancy?

The moment of conception is when the woman’s ovum (egg) is fertilised by the man’s sperm. when a sperm cell from a fertile man swims up through the vagina and into the uterus of a woman and joins with the woman's egg cell.

Stages of pregnancy

The Three Stages of Pregnancy - (1st, 2nd, and 3rd Trimester)

First Trimester

Conception to about the 12th week of pregnancy marks the first trimester.

The early changes that signify pregnancy become present in the first trimester. A missed period may be the first sign that fertilization and implantation have occurred, ovulation has ceased, and you are pregnant. Other changes will also occur.

signs of early pregnancy in many women include symptoms like

Extreme fatigue
Tender, swollen breasts. Nipples may protrude.
Nausea with or without throwing up (morning sickness)
Cravings or aversion to certain foods
Mood swings
Constipation Weight gain

The end of the first trimester is at about week 12 - baby's development

The nerves and muscles begin to work together. Your baby can make a fist.
The external sex organs show if your baby is a boy or girl.
Eyelids close to protect the developing eyes. They will not open again until week 28.
Head growth has slowed, and your baby is about 3 inches long, and weighs almost an ounce.

Second Trimester

Second trimester: Week 13 – Week 28

Once you enter the second trimester you may find it easier than the first. Your nausea (morning sickness) and fatigue may lessen or go away completely, and you will also notice more changes to your body. That baby bump will start to show as your abdomen expands with the growing baby.

End of Week 28

Your baby now weighs about 1 kg (1,000 g) or 2 lb 2oz (two pounds, two ounces) and measures about 25 cm (10 inches) from crown to rump. The crown-to-toe length is around 37 cm. The growing body has caught up with the large head and the baby now seems more in proportion.

Your baby has a regular sleep cycle.

If your baby is a boy, his testicles begin to descend into the scrotum. If your baby is a girl, her uterus and ovaries are in place, and a lifetime supply of eggs has formed in the ovaries.

Third Trimester

Third Trimester: Week 29 – Week 40 (birth)

The third trimester is the final stage of pregnancy. Discomforts that started in the second trimester will likely continue, The baby spends most of its time asleep. Its movements are strong and coordinated. It has probably assumed the head down position by now, in preparation for birth. You may find you have difficulty breathing and have to urinate more frequently, this is normal and once you give birth these problems should go away.

Third Trimester: Changes as the Due Date Approaches

Other changes are happening in your body during the third trimester that you can't see. As your due date approaches, your cervix becomes thinner and softer in a process called effacement that helps the cervix open during childbirth.

The baby is around 51 cm in length and ready to be born. It is unknown exactly what causes the onset of labour. It is most likely a combination of physical, hormonal and emotional factors between the mother and baby.

Average birth weight is between 6 pounds 2 ounces to 9 pounds 2 ounces and average length is 19 to 21 inches long, but healthy babies come in many different weights and sizes.

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