[1] Princess Maxima Ctr Pediat Oncol, Utrecht, Netherlands
[2] Erasmus MC Univ Med Ctr, Dept Obstet & Gynecol, Rotterdam, Netherlands
[3] Univ Med Ctr Utrecht, Dept Reprod Med & Gynecol, Utrecht, Netherlands
[4] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Endocrinol, Utrecht, Netherlands
[5] IJsselland Ziekenhuis, Dept Obstet & Gynecol, Rotterdam, Netherlands