Genes & Cells

Chromosomal risks of fertility treatment, vitamin A for vaccines and clues to brain cancer in this week's news

Fertility treatment risks
Fertility treatments may cause chromosomal problems in would-be mothers over age 35. A new study by researchers in Europe and Canada shows that chromosomes in older women may come prematurely unglued from one another when the ovaries are stimulated to produce eggs for in vitro fertilization.