Final answer:
In most mammals, sows can only be bred during specific periods when they are sexually attractive to males. However, human females can be sexually attractive to males at all times and are not limited to a specific hormonal cycle for breeding.
Step-by-step explanation:
In most mammals, including pigs or sows, females have specific periods when they are sexually attractive to males and can be bred. These periods coincide with ovulation, when the female has fertile eggs. However, human females are a notable exception to this general pattern, as they can be sexually attractive to males at all times, and their receptivity to mating is not restricted to a specific hormonal cycle.