Frans M. Helmerhorst

No ORCID on file · 2 papers in corpus

rct 2013

Resistance to APC and SHBG levels during use of a four-phasic oral contraceptive containing dienogest and estradiol valerate: a randomized controlled trial

Journal of thrombosis and haemostasis : JTH ·doi:10.1111/jth.12172

BACKGROUND: The use of combined oral contraceptives is associated with a 3- to 6-fold increased risk of venous thrombosis. This increased risk depends on the estrogen dose as well as the progestogen type of combined oral contraceptives. Thr…

rct 2007

The value of Chlamydia trachomatis-specific IgG antibody testing and hysterosalpingography for predicting tubal pathology and occurrence of pregnancy

Fertility and sterility ·doi:10.1016/j.fertnstert.2006.11.078

We assessed two diagnostic methods, Chlamydia trachomatis-specific IgG and hysterosalpingography (HSG), as a screening test for the likelihood of tubal damage or occurrence of pregnancy before laparoscopy in 178 subfertile women who were ra…