Week 1 Flashcards
Intrauterine development is a complex sequence of three major stages lasting nine months what are they? 
Pre-embryonic-> fertlization to 3 weeks
Embryonic-> weeks 3-8
Fetal-> weeks 8-birth
What happens during the pre-embryonic stage?
Blastocyst attaches to endometrium and proliferates
What happens during the embryonic stage?
Weeks 3-8-> zygote takes human shape = embryo
-organ systems develop
-development of structures
What happens at the fetus stage
Changes are not as dramatic and less at rick for malformations then during embryonic stage
-fetal organs are viable to live outside the womb at just 24 weeks gestation with medical assistance
- fetal circulation becomes well developed
The most basic information a maternity nurse should have concerning conception is:
a. Ova are considered fertile 48 to 72 hours after ovulation
b. Sperm remain viable in the woman’s reproductive system for an average of 12 to 24 hours
c. Conception is achieved when a sperm successfully penetrates the membrane surrounding the ovum
d. Implantation in the endometrium occurs 6 to 10 days after conception
c. Conception is achieved when a sperm successfully penetrates the membrane surrounding the ovum
What’s the difference between Dizygotic twins, Monozygotic twins, and Conjoined twins
- Dizygotic Twins (Fraternal Twins):
- Dizygotic twins, also known as fraternal twins, result from the fertilization of two separate eggs by two different sperm cells.
- Monozygotic Twins (Identical Twins):
- Monozygotic twins, commonly known as identical twins, originate from a single fertilized egg (zygote) that splits into two embryos during early development.
- Conjoined Twins (Siamese Twins):
- Conjoined twins are a rare phenomenon where identical twins do not fully separate during early development and remain physically connected.
- They are typically monozygotic, meaning they come from a single fertilized egg that didn’t fully divide.
____________________ twins is another term for fraternal twins. These twins may be the same or different sexes and genetically are no more alike than siblings born at different times.
Dizygotic
What stage of pregnancy do organ systems and external features develop?
The embryonic period 3-8 weeks after fertilization
Human gestation lasts _____ days after last menstrual period,or ____days after conception
280, 266
What are the dates of the 3 trimesters?
- Week 1 through 13
- Week 14 through 26
- Week 27 through to term (40 weeks)
________: woman who has not completed a
pregnancy with fetus or fetuses beyond 20
weeks of gestation
A) gravida
B) nulligravida
C) nullipara
D) parity
C) nullipara
_________ is the: number of pregnancies in which fetus
or fetuses have reached 20 weeks of gestation,
not number of fetuses (e.g., twins) born.
A) gravida
B) nulligravida
C) primigravida
D) parity
D) parity
___________ is a term we use for a woman who has never been
pregnant
A) gravida
B) nulligravida
C) primigravida
D) multipara
B) nulligravida
What is the medical term for “ women who is pregnant”
A) gravida
B) multigravida
C) primigravida
D) multipara
A) gravida
_________: is a woman who has had two or
more pregnancies
A) primipara
B) multigravida
C) primigravida
D) multipara
B) multigravida
