Twin studies: genetic factors are important

Are Abnormal Yolk Sac Characteristics Important Factors in Abortion Rates?

Observational studies: why are they so important?

Genetic and environmental factors in health-related behaviors: studies on Finnish twins and twin families.

Family, twin and adoption studies have provided evidence for familial and genetic influences on individual differences in disease risk and in human behavior. Attempts to identify individual genes accounting for these differences have not been outstandingly successful to date, and at best, known genes account for only a fraction of the familiality of most traits or diseases. More detailed knowle...

Genetic risk factors in tumours of the testis: lessons from twin studies.

A threefold increase for testicular carcinoma has been reported in male dizygotic twins. In this comment we suggest the hypothesis that over-exposure to endogenously hypersecreted Follicle Stimulating Hormone (FSH) may underlie the pathogenesis. This is supported by several findings. 1) FSH hypersecretion in mothers of dizygotic twins is most likely an autosomal trait implicating the possibilit...

I-32: Uterine Factors Are Important for Successful Embryo Transfer After IVF

Embryo transfer (ET) is the final and most crucial step of the IVF procedure, characterized by a close collaboration between the clinician and the embryologist. Several studies have shown improvement in clinical pregnancy rates resulting from a focus on different aspects of the gentle embryo transfer technique. Issues such as impact of physician’s experience, trial transfer, catheter type, embr...