The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
What are the 3 trimesters of pregnancy?
Pregnancy the three trimesters
- First Trimester (0 to 13 Weeks) The first trimester is the most crucial to your baby’s development. …
- Second Trimester (14 to 26 Weeks) The second trimester of pregnancy is often called the “golden period” because many of the unpleasant effects of early pregnancy disappear. …
- Third Trimester (27 to 40 Weeks)
What is the germinal stage of prenatal development?
The germinal stage is the stage of development that occurs from conception until 2 weeks (implantation). Conception occurs when a sperm fertilizes an egg and forms a zygote. A zygote begins as a one-cell structure that is created when a sperm and egg merge.
What are the 3 periods of prenatal development?
This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period, or period of organogenesis, which lasts …
What fetal development occurs in the 2nd trimester?
The fetus is about 61/4-inches from head to rump. All organs and structures have been formed, and a period of simple growth begins. Respiratory movements occur, but the lungs have not developed enough to permit survival outside the uterus. By this time, the woman can feel the fetus moving.
How do you self check your stomach for pregnancy?
Walk your fingers up the side of her abdomen (Figure 10.1) until you feel the top of her abdomen under the skin. It will feel like a hard ball. You can feel the top by curving your fingers gently into the abdomen. Figure 10.1 With the woman lying on her back, begin by finding the top of the uterus with your fingers.
What trimester is the hardest?
The first trimester seems to be the toughest trimester for many women. When your body is still adjusting to creating a human being, women are affected in a very dramatic way. We weigh-in to share which trimester was the hardest during their pregnancies.
What is the germinal stage?
The germinal stage begins at conception when the sperm and egg cell unite in one of the two fallopian tubes. The fertilized egg is called a zygote. Just a few hours after conception, the single-celled zygote begins making a journey down the fallopian tube to the uterus.
What occurs during the germinal stage?
The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus. During this time, the organism begins cell division and growth. After the fourth doubling, differentiation of the cells begins to occur as well.
Why is it called germinal stage?
The two-week period after conception is called the germinal stage. Conception occurs when a sperm cell combines with an egg cell to form a zygote. … The resulting ball of cells moves along the mother’s fallopian tube to the uterus.
What is the most sensitive period of prenatal development?
The first trimester is the critical period of organogenesis, when the major organs form. Exposure during this time, and particularly during the first 2 months—the embryonic period—can result in dysmorphia.
What are the 7 stages of development?
- Stage 1: Trust vs. Mistrust.
- Stage 2: Autonomy vs. Shame and Doubt.
- Stage 3: Initiative vs. Guilt.
- Stage 4: Industry vs. Inferiority.
- Stage 5: Identity vs. Confusion.
- Stage 6: Intimacy vs. Isolation.
- Stage 7: Generativity vs. Stagnation.
What are the hazards of prenatal development?
Prenatal risk factors include chronic maternal illness, certain maternal infections, toxin exposures and nutritional deficiencies. Risk factors in the perinatal period include pregnancy-related complications, prematurity and low birth weight, and infection exposure during pregnancy or at time of birth.
What week does the baby grow the most?
Week 31: Baby’s rapid weight gain begins
Thirty-one weeks into your pregnancy, or 29 weeks after conception, your baby has finished most of his or her major development. Now it’s time to gain weight — quickly.
Which trimester does the baby grow the most?
The Second Trimester: Fetal Development. Now that all the major organs and systems have formed in the fetus, the following six months will be spent growing. The weight of your fetus will multiply more than seven times over the next few months, as the fetus becomes a baby that can survive outside of the uterus.
Which month baby grows faster in pregnancy?
Ninth month of pregnancy
Your baby’s skin looks less wrinkled as it gains a bit of weight, including brown fat. The brain has a huge growth spurt this month, which is why waiting for labor to begin on its own is best. Typically, your baby has been in a head-down position or will assume one as birth nears.