Final answer:
Lutalyse does not result in abortion if pregnancy is greater than 170 days due to luteolysis resistance.
Step-by-step explanation:
Lutalyse does not result in abortion if pregnancy is greater than 170 days due to luteolysis resistance. Lutalyse is a prostaglandin that induces luteolysis, leading to a decrease in progesterone production by the corpus luteum. However, after 170 days of pregnancy, the placenta takes over progesterone production, making it resistant to the effects of Lutalyse.