Assertion: donor's sperm | /r/HasProperty | frozen
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Thus while fresh sperm from most men easily initiates pregnancies, only a small minority produce sperm which can be frozen, stored, and thawed before use and still retain the exceptional viability and vitality needed to produce pregnancies at a high rate.
text: Donor eggs and sperm are often frozen before they’re given to recipients.