Jan J. Brosens

Endometriosis is a common and debilitating condition of women in their reproductive age that is associated with pain and infertility. Current medical treatments are only partially effective and associated with wide-ranging side effects. New…

The success of normal pregnancy depends on the protection, controlled invasion, and growth of the semiallogenic placenta within the maternal uterine environment. In the endometrium, the maternal response to pregnancy is characterized by inf…

Modern imaging techniques allow non-invasive diagnosis of adenomyosis, a relatively common disorder characterized by the presence of heterotopic endometrial glands and stroma in the myometrium with hyperplasia of the adjacent smooth muscle.…

BACKGROUND: We postulated that impaired endometrial differentiation in women with pelvic endometriosis predisposes for pre-eclampsia. METHODS: A retrospective case-control study set at the University of Ghent IVF centre. The incidence of p…

BACKGROUND: Local biosynthesis of estrogens is thought to be important for the maintenance and growth of endometriotic implants. In addition to the formation of estrogen via the aromatase pathway, steroid sulphatase (STS), which is responsi…

TGFbeta1 is thought to be intimately involved in cyclic tissue remodeling and inflammatory events associated with menstruation. Menstruation is initiated by progesterone withdrawal; however, the underlying mechanisms are not well understood…

Magnetic resonance imaging has revealed that the endometrio-myometrial interface constitutes a distinct, hormone-dependent uterine compartment termed the junctional zone. In the non-pregnant uterus, highly specialized contraction waves orig…

Menstruation, or cyclic shedding of nonpregnant endometrial tissue with associated bleeding, occurs only in humans and a few other species. This breakdown of the endometrium in response to falling ovarian progesterone levels is a complex pr…

This chapter reviews the epidemiological evidence in support of a pathological link and discusses the implications for clinical management. Several epidemiological studies have investigated pregnancy outcome in singleton pregnancy after in …

BACKGROUND: The success of IVF treatment is dependent upon embryo quality and coordinated growth and differentiation of the endometrium. Aromatase P450 expression in the human endometrium is thought to be restricted to women with proliferat…

Endometriosis is defined by the presence of endometrial tissue outside the uterus. Clinical and basic research in endometriosis has been hampered severely by the lack of accurate noninvasive diagnostic techniques. Transvaginal ultrasonograp…

PURPOSE OF REVIEW: Laparoscopy is the gold standard for the diagnosis of endometriosis but the need for visual evidence of the disease is a major stumbling-block for both effective clinical management of affected patients as well as for res…

OBJECTIVE: To determine whether expression of aromatase P450 mRNA in eutopic endometrium is predictive of the presence of pelvic endometriosis. DESIGN: A prospective, multicenter, observational study. SETTING: Four tertiary centers for re…

OBJECTIVE: To review the role of laparoscopy in the management of chronic pelvic pain (CPP). METHOD: A literature search was conducted to obtain a clear perspective on the role of laparoscopy for CPP. RESULTS: Laparoscopy has been widely …

Transvaginal hydrolaparoscopy has been described as an office procedure that is particularly suitable for the diagnosis of endometriosis and adhesions. It is recommended as a first line procedure in patients with infertility. The procedure …

Human non-gravid myometrium differentiates in response to ovarian sex steroids into a subendometrial layer or junctional zone and an outer myometrial layer. Compared to the outer myometrial layer, the junctional zone myocytes are characteri…

Abstract Traditionally, the term adenomyosis denotes the presence of endometrial glands and stroma deep within the myometrium. Until recently, the diagnosis could only be made after hysterectomy by which time its clinical relevance was mere…