FIRST TRIMESTER 0-12 WEEKS

 

When you are pregnant, a baby grows within your uterus for around 40 weeks, beginning on the first day of your last menstruation. These 40 weeks are divided into three phases, or trimesters, that last about nine weeks each.

FIRST TRIMESTER 

The first two weeks of the first trimester, which lasts for around 13 weeks, are spent by your body preparing for pregnancy rather than really being pregnant because of how your due date is established. An egg is released from your ovary during ovulation, a procedure that takes place in the second week. When a mother's egg and a father's sperm join, usually in the fallopian tubes, at the end of the second week, conception, also known as fertilization, takes place. Genetic material from the mother and father unites during conception to produce a distinct genetic code.

The beginning of a new human being is this newly formed single cell, also referred to as an embryo or zygote. Numerous other features, like sex, hair color, eye color, and others, can be determined in a second. The zygote divides into a hollow ball of cells known as a blastocyst during the third week. The blastocyst cells begin to organize themselves into two groups. Your baby will emerge from the inner group, and the outer group will form. During week four, the blastocyst enters the uterus and, after emerging from this outer layer, hatches out of it.

In a process known as implantation, the blastocyst might embed itself in the thicker lining of the uterine wall. The embryonic period, which lasts from weeks five to ten, is when the majority of the body's primary organs, including the brain, spinal cord, and heart, begin to develop. During this time, the heart starts to beat, the placenta and umbilical cord start supplying the embryo with nutrition and oxygen from the mother, and toward the conclusion of the embryonic phase, bones and muscles begin to develop behind a thin layer of translucent skin.

By the end of week 10, the embryo, now known as the fetus, measures about one and a quarter inches from the top of the head to the bottom and is beginning to resemble a human. The arms and legs keep growing and becoming the whole human bodies throughout the next weeks. By the conclusion of the first trimester, the baby's finger and toe growth has ended, and its face has finished developing. The various hormone levels that circulate throughout your body cause a number of changes in your body during the first trimester. Your baby is little over three inches long.

The most typical early sign of pregnancy is the cessation of menstrual periods. However, you may also experience other signs and symptoms, such as nausea, or so-called morning sickness, which can strike at any time of day and cause tender, swollen breasts and mood swings, constipation, weight gain or loss, cravings for or aversions to particular foods, and feeling more tired than usual.

If you have any worries about how you're feeling or questions about how your baby is developing, talk to your doctor. You might only experience some of these symptoms, if any at all.