Pregnancy and lactation Flashcards
What are the nutrition stages of life?
- prior to pregnancy
- during pregnancy
- after pregnancy
At no stage of life is nutrition most crucial. When?
pregnancy and infancy
Adequate nutrition is essential for what from conception through the end of first year of age?
tissue formation, neurologic development, bone growth
Healthy development of the placenta depends on what?
adequate pre-pregnancy nutrition
What are the support tissues for the baby?
- uterus
- placenta
- umbilical cord
- amniotic sac
What is the first event of pregnancy?
fertilization and cell division
fertilized ovum (zygote)
- single cell that divides rapidly to become a blastocyst
What is the second event of pregnancy?
Implantation (during the first week)
- blastocysts embeds in the uterine wall
- placenta development begins
- crucial time for development
What happens at the first 6 weeks of pregnancy?
rapid physical changes of the embryo
What happens at 8 weeks?
- complete nervous and digestive symptoms
- well-defined fingers and toes
- facial features begin
What happens at the last 7 months
- cell division and development of organs
- 39-42 weeks for full gestation
What is the average birth weight?
6.8-7.9 pounds
When is the zygote development?
0-2 weeks
When is the embryo development?
- critical period
- 2-8 weeks
When do you see signs of placental formation?
4th week
What is embryogenesis?
rapid development stage