How many stages are there in fetal development?
Prenatal development is the process that occurs during the 40 weeks prior to the birth of a child. There are three stages of prenatal development: germinal, embryonic, and fetal. Prenatal development is also organized into three equal trimesters, which do not correspond with the three stages.
What are the 4 stages of human development in the womb?
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 is the most important stage of prenatal development?
In general, major defects of the body and internal organs are more likely to occur between 3 to 12 embryo / fetal weeks. This is the same as 5 to 14 gestational weeks (weeks since the first day of your last period). This is also referred to as the first trimester.
What is the correct order of human development?
Human Life Stages: In the field of developmental psychology, the process of human development can be divided into 8 separate stages. These stages are prenatal, infancy, early childhood, middle childhood, adolescence, young adulthood, middle adulthood, and late adulthood.
What external factors can cause miscarriage?
What causes miscarriage?
- Infection.
- Exposure to environmental and workplace hazards such as high levels of radiation or toxic agents.
- Hormonal irregularities.
- Improper implantation of fertilized egg in the uterine lining.
- Maternal age.
- Uterine abnormalities.
- Incompetent cervix.
What are the factors affecting pregnancy?
Factors like age and overall health status can increase your chances of experiencing complications during pregnancy.
- Reproductive abnormalities.
- Women under age 20.
- Women over age 35.
- Weight.
- Diabetes.
- Sexually transmitted infections (STIs)
- Preexisting medical conditions.
- Multiple pregnancies.
What are the factors affecting 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 factors can harm the fetus during pregnancy?
Maternal factors include maternal size, weight, weight for height, nutritional state, anemia, high environmental noise exposure, cigarette smoking, substance abuse, or uterine blood flow.