Adjuvant chemotherapy has been associated with mild cognitive decline among a subset of breast cancer survivors. Late cognitive effects after chemotherapy can have a deleterious impact on survivor ...

Monozygotic 24-year-old twins presented with discordant ovarian function. One had had premature ovarian failure at the age of 14 years, whereas her sister had normal ovaries and three naturally ...

In 2004, Michigan police found that DNA recovered from a crime scene matched that of Jerome Cooper, a notorious criminal. But what seemed like an open-and-shut case got complicated when the cops found ...

Multiple births are becoming more common than they were in the past. Many women are waiting longer before having children than they did in previous generations. Fertility treatments and modern ...

Monozygous twins share a common genotype. However, most monozygotic twin pairs are not identical; several types of phenotypic discordance may be observed, such as differences in susceptibilities to ...

It is widely regarded that twins can be used as a natural experiment to subject hypotheses to empirical testing regarding the contributions of genetic factors to phenotypic variability in human traits ...

The prevalence of thyroid disorders in the general population is small where hyperthyroidism seems to be less frequent than hypothyroidism. Kasagi et al. assessed thyroid function in the Japanese ...

We previously reported in the Journal a case of a successful ovarian transplantation between 25-year-old monozygotic twins. One had undergone menopause at the age of 14 years, whereas the other was ...