It's a "choice" basically engineered from birth.
Chamberlain and his team considered if the pay gap would disappear once you take into account differences between the men and women's level of education, experience, occupation, job title and location.
16:07 Can pro-choice and pro-life women find common ground? It’s complicated
06:13 Pound quivers near three-month low, stocks weak before May's Brexit stance speech20
05:09 Sterling slides to 3-month lows on 'hard Brexit' fears14
01:03 Sterling slides to three-month lows on 'hard Brexit' fears15