Conception and Childbirth Flashcards
How many hours do oocytes remain viable for after ovulation?
12-24 hours
How long are most sperm viable in female reproductive tract for?
12-48 hours some up to 5 days
When can fertilization take place?
If intercourse occurs 5 days prior to and 1 day after ovulation
How many sperm can ejaculation have?
200-400 million sperm
Why do only a few thousand/hundred sperm actually reach the fallopian tubes?
The others are lost by leaking out vagina, destroyed by the acidic environment, destroyed by WBC in the uterus
Zygote division at 4-5 days (Development of the conceptus)
There are 100 cells called a BLASTOCYST
Zygote division at day 5 (Development of the conceptus)
The blastocyst arrives in the uterus where it floats for a day or two and then implanting in the endometrium = implantation take @ 1 week
Human Chorionic Gonadotropin (HCG)
Is secreted by the blastocyst maintains the uterine environment = prevents shedding of lining and embryo friendly environment
Zygote division at 8th week (Development of the conceptus)
Blastocyst grow into an embryo until 8th week where it is referred to as a fetus
Development during the 1st 2-3 weeks
The embryonic membrane which include amniotic sac; yolk sac which produces the embryo’s 1st blood cell and germ cell that will develop into gonads
3rd week of Development
Cell migration occurs and development of organs = brain begins to form
4th week of Development
Digestive, circulatory system & heart begin to develop
by the end of the 4th week spinal cord and nervous system develop
5th week of Development
Formation of the arms and legs
7th week of Development
Reproductive organs begin to differentiate
8th week of Development
Fetus is the size of a thumb
12th week of Development
Arms, hand, finger, legs, feet and toes and eyes are almost fully developed
15th week of Development
Fetus has strong heart, active muscle, digestive functioning, eyebrows appear the fetus is covered with a fine hair called Lanugo
5 months of Development
The fetus is 10-12 inches and weighs ½ - 1 lb – lungs can’t function outside the uterus
6 month of Development
The fetus is 11-14 inches weigh 1 lb.
7 months of Development
The fetus is 13-17 inches weighs 3 lbs (healthy fetus can survive)
The final 2 months of Development
The fetus grow rapidly @ 9 months fetus = 20 inches @ 7 to 8 lbs
Placenta
Connects the developing fetus to the uterine wall to provide nutrients and O2 via mother’s bloodstream and the fetus also remove waste products from the fetus’s blood
Pregnancy detection
Tests are designed to detect the presence of human chorionic gonadotropin (HCG) which is secreted by the placenta
Although test can predict pregnancy with 95% accuracy not absolute until what is felt?
The fetal heart beat and movement can be detected (with ultrasound)
Heagar’s sign
Softening of the uterus just above the cervix, can be felt with an internal examination
Health of the woman and man before conception and women early in the pregnancy can affect what?
The health of the fetus
Pre-conception health
Health of the individual during their reproductive years and steps necessary to protect the health of the baby the MAY have
Preconception Health care
Focuses on the part of health that have been shown to increase the chance of heaving a healthy baby
Prenatal Care
after a women becomes pregnant and involves monitoring the baby’s development and mother’s health