$IVF$ in which the early zygote with up to ...$A$... blastomere is transferred to the Fallopian tube is called $\ldots$....

Test tube baby is a technique where:

Briefly explain $\rm {IVF}$ and $\rm {ET}$, What are the conditions in which these methods are advised ?

$A$ : Disease or infections which are transmitted through sexual intercourse are collectively called sexually
transmitted diseases.
$R$ : $STDs$ if not properly treated may lead to pelvic inflammatory diseases, abortion, still birth, ectopic
pregnancies, infertility or even cancer of reproductive tract.

Infertility cases either due to inability of the male partner to inseminate the female or due to very low sperm counts in the ejaculates, could be corrected by .......... technique.

$A$ : In test-tube baby programme, ova from wife/donor (female) and sperms from the husband/donor (male) are collected and induced to form zygote under simulated conditions in laboratory.
$R$ : Embryos with more than 8 blastomeres are then transferred to fallopian tube $(ZIFT)$ to complete its further development.