Does the RCC view 'prevention of ovulation' in the same light as 'abortion'?

Jacob Rees-Mogg, the Leader of the British House of Commons and Lord President of the Council, was corrected publicly by a Labour Member of Parliament when, in declining to engage in debate regarding ECP ('Emergency Contraception Pill', the so-called 'morning after pill') he referred to it as an 'abortifacient'. The Labour M.P. (to whom Mr Rees-Mogg has yet to reply) stated that an ECP prevents ovulation and does not abort an embryo. Therefore, she stated, the term 'abortifacient' does not apply. *Is Mr Rees-Mogg expressing the position of the Roman Catholic Church on this matter or is it his own private conscience he is exercising ?* ------------------------------ Both my wife and I chose, during our marriage, not to use contraception, nor to use ultra-sound prior to birth ; and we accepted responsibility for the outcomes (which was four healthy children).