OBJECTIVE
To analyze, in accordance to contemporary and current chronicles and manuscripts, all known data about possible infertility or sterility suffered by Henry IV and attempts of artificial insemination undertook by his wife Juana of Portugal with the Monarch's semen due to his complete
BACKGROUND
Multiple pregnancy has increased in prevalence in the last few years, which could lead to more foetal and maternal morbidity issues. The aim of this study is to describe the trend of multiple pregnancy deliveries in Castilla y León during the last 13years and the subsequent impact on
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