Aurelio Tobias

BACKGROUND: Controlled ovarian stimulation (COS) is an essential step in most assisted conception cycles. Different treatment combinations (termed protocols) exist in COS, yet there is no consensus on their relative effectiveness and safety…

STUDY QUESTION: Is serum vitamin D associated with live birth rates in women undergoing ART? SUMMARY ANSWER: Women undergoing ART who are replete in vitamin D have a higher live birth rate than women who are vitamin D deficient or insuffic…