Final answer:
Artificial insemination is the method that involves injection of sperm into a woman for reproduction.
Step-by-step explanation:
The method that involves injection of sperm into a woman for reproduction is artificial insemination. This procedure is typically used when there is difficulty in natural conception, and it can be performed using the partner's sperm or a donor's sperm. During artificial insemination, the sperm is placed directly into the woman's uterus or cervix, increasing the chances of fertilization.
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