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A couple comes in for an infertility appointment,having attempted to get pregnant for 2 years.The woman,37,has always had irregular menstrual cycles but is otherwise healthy.The man has fathered two children from a previous marriage and underwent a vasectomy reversal 2 years ago.The man has had two normal semen analyses,but the sperm seem to be clumped together.What additional test is needed?
O2 Levels
The concentration of oxygen in a given environment, crucial for the respiration of most aerobic life forms.
Half-Life
The time required for a quantity to reduce to half its initial value. In the context of radioactivity, it’s the time it takes for half of the radioactive atoms in a sample to decay.
Radioisotope
Isotope with an unstable nucleus.
Radiometric Dating
A technique used to date materials such as rocks or carbon, by measuring the decay rate of radioactive isotopes contained within those materials.
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