law: The Assisted Reproductive Technology (Regulation) Act, 2021
  24. Duties of assisted reproductive technology clinics using human gametes and embryos. -
  While using human gametes and embryos, the duties to be performed by the clinics and banks shall be as under:-
  (a) the clinics shall retrieve oocytes in such manner as may be specified by regulations;
  (b) not more than three oocytes or embryos may be placed in the uterus of a woman during the treatment cycle in such manner as may be specified by regulations;
  (c) a woman shall not be treated with gametes or embryos derived from more than one man or woman during any one treatment cycle;
  (d) a clinic shall never mix semen from two individuals for the procedures specified under this Act;
  (e) the embryos shall not be split and used for twinning to increase the number of available embryos;
  (f) the collection of gametes posthumously shall be done only if prior consent of the commissioning couple is available in such manner as may be prescribed;
  (g) the clinic shall not use ovum that are derived from a foetus, in any process of in-vitro fertilisation; and
  (h) such other duties as may be prescribed. 14
   
  Explanation.-For the purposes of this section, the expression-
  (i) "fertilisation" means the penetration of the ovum by the spermatozoon and fusion of genetic materials resulting in the development of a zygote; and
  (ii) "foetus" means a human organism during the period of its development beginning on the fifty-seventh day following fertilisation and ending at birth or abortion.