What makes a good egg and healthy embryo? Zinc discovery may help in future fertility treatments

Scientists and fertility doctors have long tried to figure out what makes a good egg that will produce a healthy embryo. It's a critical to know which eggs isolated from a woman will produce the best embryos and ultimately babies. New research reveals eggs need a tremendous dose of zinc to reach maturity and be ready for fertilization -- a finding that may ultimately help physicians assess the best eggs for fertility treatment.

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