Reproductive Health Problems And Strategies

In In Vitro Fertilization (IVF):

• The fertilized egg (zygote) is allowed to divide and form an embryo outside the body.
• When the embryo reaches the stage of more than 16 blastomeres (usually at the blastocyst stage), it is ready to be implanted.
• Such a developed embryo is transferred into the uterus, where implantation occurs.

Other options:

• Fallopian tube – used for transferring a zygote with fewer than 8 blastomeres (ZIFT method).
• Fimbriae – finger-like projections at the end of the fallopian tube, not used for embryo transfer.
• Cervix – lower part of uterus, not a site for embryo implantation.

Hence, the correct site for transferring an embryo with more than 16 blastomeres is: uterus.

Vasectomy and Spermatogenesis

The is a duct that transports sperm from the epididymis (where sperm mature and are stored) to the ejaculatory duct during ejaculation.

Vasectomy:

Vasectomy is a surgical method used as a form of male contraception. In this procedure:

• The vasa deferentia are cut and sealed.
• After the procedure, sperm can no longer travel from the epididymis to the ejaculatory duct, thus preventing sperm from being present in the ejaculate.
• While sperm are still produced and stored in the epididymis, they are not present in the seminal fluid after vasectomy.
• It is considered an irreversible method of contraception because it typically cannot be undone.

Conclusion:

Vasectomy is an effective and permanent form of contraception in males. After the surgery, sperm are present in the epididymis but are not part of the ejaculate.

ZIFT and IUT are the techniques in which embryos are transferred to assist those females who cannot conceive.

The correct option is option A.

1. The full form of ZIFT is Zygote Intrafallopian Transfer.
2. In ZIFT, the embryo is transferred in the fallopian tube to the 8-blastomere stage.
3. The success rate of ZIFT is very high ensuring fertilization.
4. IUT refers to intrauterine transfer.
5. In IUT, the embryo is transferred to the uterus in the 32 blastomere stage.

Explanation of the incorrect options:

ICSI is intra-cytoplasmic sperm injection. In this, healthy sperm is injected into the ovum.

GIFT refers to gamete intrafallopian transfer. In this technique, two retrieved ova and washed sperms are transferred into the fallopian tube through a laparoscope.

Hence, the correct option is ZIFT and IUT - In ZIFT & IUT embryos are transferred to assist the females who cannot conceive.