What defines Germinal Stage?
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.
What is the germinal period quizlet?
Germinal Period. period of prenatal development that takes place in the first two weeks after conception. Fertilization. process where sperm and egg join. Zygote.
What characterizes the germinal stage of gestation?
The Germinal Period (Weeks 1-2) The mother and father’s DNA is passed on to the child at the moment of conception. The genetic makeup and sex of the baby are set at this point. The germinal period (about 14 days in length) lasts from conception to implantation of the zygote (fertilized egg) in the lining of the uterus.
How long is 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.
Why is the germinal stage important?
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.
How long does the germinal period last quizlet?
29 weeks. You just studied 17 terms!
What occurs in the germinal stage quizlet?
What happens during the germinal period of development? The protective structures of the fetus start to form and provide nourishment from the mother, and the zygote turns into an embryo. You just studied 25 terms!
Which trimester is the most critical for fetal development?
The first trimester is the most crucial to your baby’s development. During this period, your baby’s body structure and organ systems develop. Most miscarriages and birth defects occur during this period. Your body also undergoes major changes during the first trimester.
What can go wrong during embryonic stage?
Your developing baby is most vulnerable to injury during the embryo stage when organs are developing. Indeed, infections and drugs can cause the greatest damage when exposure occurs two to 10 weeks after conception. Diabetes and obesity can possibly increase your child’s risk of birth defects.
How long does the germinal stage of pregnancy last?
The main events in this stage of development are illustrated in Figure 23.2. 2 and described in detail in the rest of this concept. The germinal stage lasts a total of eight to nine days. It begins in a Fallopian tube when an ovum is fertilized by a sperm to form a zygote (day 0).
When does the germinal stage of an ovum begin?
The germinal stage lasts a total of eight to nine days. It begins in a Fallopian tube when an ovum is fertilized by a sperm to form a zygote (day 0).
What happens in the germinal stage of the zygote?
The germinal stage continues as the zygote undergoes several initial cell divisions to form a solid ball of cells called a morula (days 3-4). It then continues as the morula undergoes additional changes to become a hollow ball of cells called a blastocyst (days 5-7).
When does the germinal stage of the morula end?
It then continues as the morula undergoes additional changes to become a hollow ball of cells called a blastocyst (days 5-7). The germinal stage ends when the blastocyst implants in the endometrium of the uterus (days 8-9).