The stage transferred into the uterus after induced fertilization of ovum in the laboratory is
- morula
- embryo at 2 blastomeres stage
- zygote
- embryo at 4 blastomeres stage
Answer
(1) morula
Solution
As per NCERT, in IVF the ova and sperms are fertilised in the laboratory (in vitro) to form a zygote.
⇒ The zygote or early embryos (with up to 8 blastomeres) are transferred into the fallopian tube (ZIFT).
⇒ Embryos with more than 8 blastomeres are transferred into the uterus (IUT – intra uterine transfer).
∵ The morula is the embryo with 8–16 blastomeres, it is the stage transferred into the uterus.
∴ The stage transferred into the uterus is the morula.
Answer: (1)