The term test tube baby is generally employed when,

Options :
  1. Foetus is developed in a test tube
  2. The ovum is fertilized externally and thereafter implanted in the uterus
  3. Zygote develops from a non-fertilized egg
  4. Zygote develops from non-fertilized sperm
Answer and Explanation :-

Answer: Option 2


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Kids are trusting and wise and I cannot think of a less useful combination to be born with. The wisdom lets children know who they are. And then the trust lets everyone else take that knowledge away.
-Sean Wilsey Oh the Glory of it All