The causes and management of equine multiple pregnancies. Multiple pregnancies are an increasing problem in breeding management. They are usually multizygotic (originating from several ova, i.e., the ...

The birth of twins in all human populations is puzzling because the female uterus is designed to carry just one fetus. Multiple birth pregnancies have higher frequencies of serious physical and health ...

The advent of fertility treatments has led to an increase in the rate of multiple births in the United States. However, the trends in and magnitude of the contribution of fertility treatments to the ...