Question

Embryo with more than 16 blastomeres formed in vitro fertilization is transferred into
(a)Fimbriae
(b)Cervix
(c)Uterus
(d)Fallopian tube

Answer 1

The organ which is hollow, pear-shaped also known as womb. This is the place where implantation takes place in the female reproductive organ. The organ has the ability to stretch up to a large extent.

Complete answer:
In in-vitro fertilization the blastocyst of 16 celled stages to the uterus for high implantation potential during this stage. In in-vivo fertilization when the fertilized oocyte develops into a morula and free blastocyst which hatches from the pellucid zone it goes from the ampulla through the fallopian tube into the uterine cavity for implantation.

Additional Information: -In vitro fertilization is a process of removing an ovum or ova from women’s ovaries and letting sperm fertilize them in a nutrient liquid under the aseptic condition in the laboratory.
-The 16 celled stages of blastomere are known as a morula.
-After fertilization, the embryos are allowed to grow in special nutrient media for three to five days until they reach optimal growth.
-Before morula, all blastomeres are autonomous without any specified fate.
-Human blastocyst should hatch from the shell and begin to implant within one to two days after five days of in-vitro fertilization blastocyst transfer.
-In in-vivo fertilization, the blastocyst should hatch and implant at the same time that is about six to ten days after ovulation.
-After the morula, is implantation to the uterus cellular differentiation takes place into two types- trophoblast cells that are surrounded by the blastocyst and other is inner cell mass which is embryoblast.
-The implantation requires structural changes in both the blastocyst and endometrial wall.

So, the correct answer is, “uterus.”

Note: -The steps for in-vitro fertilization are-initial evaluation, suppression of natural hormonal cycle, ovarian stimulation, collection of oocytes, collection of sperms, in- vitro fertilization of oocytes, embryo transfer.
-In in-vitro fertilization, it is necessary to modulate the immune system to allow the invasion of foreign embryonic cells.