To ask the Secretary of State for Health

(1) how many eggs are required before the research to enable (a) pro-nuclear transfer and (b) maternal spindle transfer is considered safe for treatment in women;

(2) pursuant to the answer to the hon. Member for Congleton of 7 April 2014, Official Report, columns 42-3W, on in vitro fertilisation, what estimate he has made of the number of eggs that would be required annually for (a) pro-nuclear transfer and (b) maternal spindle transfer every year.

There is no set number of eggs required for use before the research to enable pro-nuclear transfer and maternal spindle transfer can be considered safe for use in the treatment of women.

The Human Fertilisation and Embryology Authority has advised that it has made no estimate of the number of eggs that would be required annually for pro-nuclear transfer and maternal spindle transfer.