In which of the following techniques the embryos are transferred to assist those females who cannot conceive:

The correct option is C

ZIFT & IUT

The correct option is option C.

Explanation of the correct option:

1. ZIFT stands for zygote intrafallopian transfer.
2. In ZIFT zygote or embryo is transferred to the 8-blastomere stage in the fallopian tube.
3. In ZIFT fertilization is already ensured hence its success rate is very high.
4. IUT stands for intrauterine transfer.
5. In IUT embryo is transferred to the uterus in the 32 blastomere stage.

Explanation of the incorrect options:

Option A:

1. ICSI stands for intra-cytoplasmic sperm injection.
2. In ICSI a single healthy sperm is injected into an ovum.
3. It is done in the case where the sperm count is very low.
4. ZIFT stands for zygote intrafallopian transfer.
5. In ZIFT zygote or embryo is transferred to the 8-blastomere stage in the fallopian tube.

Option B:

1. GIFT stands for gamete intrafallopian transfer.
2. In this technique washed sperms and two retrieved ova are transferred into the fallopian tube with the help of a laparoscope.
3. Fertilization occurs in the fallopian tube in GIFT.
4. ICSI stands for intra-cytoplasmic sperm injection.
5. In ICSI a single healthy sperm is injected into an ovum.

Final answer: In ZIFT & IUT embryos are transferred to assist those females who cannot conceive.