F. van der Veen

STUDY QUESTION: Which couples with unexplained subfertility can expect increased chances of ongoing pregnancy with IVF compared to expectant management? SUMMARY ANSWER: For couples in which the woman is under 40 years of age, IVF is associ…

STUDY QUESTION: How well does a previously developed dynamic prediction model perform in an external, geographical validation in terms of predicting the chances of natural conception at various points in time? SUMMARY ANSWER: The dynamic p…

OBJECTIVES: To compare the effectiveness of in vitro fertilisation with single embryo transfer or in vitro fertilisation in a modified natural cycle with that of intrauterine insemination with controlled ovarian hyperstimulation in terms of…

Since the introduction of in vitro fertilization (IVF) in 1978, over five million babies have been born worldwide using IVF. Contrary to the perception of many, IVF does not guarantee success. Almost 50% of couples that start IVF will remai…

STUDY QUESTION: What reproductive choices do women make after they have cryopreserved oocytes for medical reasons? SUMMARY ANSWER: Women who had cryopreserved oocytes for medical reasons and tried to become pregnant, either attempted natur…

STUDY QUESTION: Are we able to develop a model to calculate the chances of pregnancy prior to the start of the first IVF cycle as well as after one or more failed cycles? SUMMARY ANSWER: Our prediction model enables the accurate individual…

BACKGROUND: Long-term effects of ovarian stimulation for IVF on the risk of ovarian malignancies are unknown. METHODS: We identified a nationwide historic cohort of 19,146 women who received IVF treatment in the Netherlands between 1983 an…

BACKGROUND: Guidelines recommend diagnostic laparoscopy in subfertile women with known co-morbidities in their medical history. Aggregated evidence underpinning these recommendations is, however, currently lacking. OBJECTIVE: The objective…

OBJECTIVE: To evaluate the cost-effectiveness analysis of hysterosalpingography (HSG), laparoscopy, and Chlamydia antibody testing (CAT) in subfertile couples. DESIGN: Cost-effectiveness analysis. SETTING: Decision analytic framework. PA…

In this study, we compare the prognostic significance of hysterosalpingography (HSG) and laparoscopy for fertility outcome. In a prospective cohort study in 11 clinics participating in the Canadian Infertility Treatment Evaluation Study (CI…

OBJECTIVE: To determine the prognostic significance of laparoscopy results for fertility outcome. STUDY DESIGN: Consecutive patients undergoing hysterosalpingography and laparoscopy for subfertility in our department between May 1985 and N…

OBJECTIVE: To assess the diagnostic performance of serum CA-125 measurement in the detection of endometriosis. DESIGN: Meta-analysis. SETTING AND PATIENT(S): Twenty-three studies comparing serum CA-125 levels and laparoscopically confirme…