Fetal Growth and Development Flashcards
Menstrual age is usually __ weeks before ovulation and fertilization
2 weeks
This is the elapsed time since the first day of the LMP
Menstrual age or Gestational age
Menstrual age is nearly __ weeks before implantation of the blastocyst
3 weeks
The number of days and calendar month duration of mestrual age
280 days
9 1/2 months
This starts 3 weeks after ovulation
Embryonic period
Positive pregnancy test
3 weeks after ovulation
Embryonic disc is well defined, the body stalk is differentiated
3 weeks after ovulation
Chorionic sac is approximately 1 cm
3 weeks after ovulation
There is a true intervillous space that contains maternal blood
3 weeks after ovulation
Villous core in which angioplasties chorionic mesoderm can be distinguished
3rd week after ovulation
Chorionic sac is 2 to 3 cm in diameter
4th week after ovulation
Embryo is about 4 to 5 mm in length
4th week after ovulation
Partitioning of the primitive heart begins
4th week after ovulation
Arm and leg buds are present
4th week after ovulation
Amnion begins to unsheathe the body stalk which becomes the umbilical cord
4th week after ovulation
The embryo is 22 to 24 mm in length
6th week after fertilization
Head is quite large compared to the trunk
6th week after fertilization
Heart is completely formed
6th week after fertilization
Fingers and toes are present
6th week after fertilization
Arms bend at the elbow
6th week after fertilization
Upper lips is complete
6th week after ovulation
External ears from definitive elevations on either side of the head
6th week after fertilization
This occurs 8 weeks after fertilization or 10 weeks after the onset of the last menstrual period
Fetal period
The embryo fetus is nearly 4cm long
Fetal period