The amendments were put forward to the Human Fertilisation and Embryology Bill by Nadine Dorries MP, who proposed that cutting the limit down to 20-weeks would send out a less causal message about abortion and help to lower abortion rates.
But last night MPs voted to defeat her 20-week proposal by 332 votes to 190. A move to bring in a 22-week limit was also opposed by 304 votes to 233.
Earlier, MPs rejected a cross-party move for doctors to consider the need for a father before allowing IVF treatment by 70 votes.
The ruling will prevent fertility clinics from turning away lesbians and single women because their children will not have a father or male role model.
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