Question

question # 3
multiple choice
michelle and her husband are trying to conceive a baby. she knows she will be ovulating (when the egg is in the fallopian tube) on wednesday. when would michelle and her husband need to conceive the baby before the egg travels to the uterus?

○ by thursday
○ a month later
○ by saturday
○ the following wednesday

Explanation:

The egg in the fallopian tube is viable for fertilization for about 12 - 24 hours, but sperm can survive in the female reproductive tract for up to 5 days. However, to fertilize the egg before it travels to the uterus (which happens shortly after ovulation, with the egg's viability being short), the time frame for conception around ovulation: if ovulation is on Wednesday, the egg is viable for a short period, but the option 'by Saturday' is incorrect. Wait, actually, the correct understanding is that the egg is in the fallopian tube during ovulation and is viable for fertilization for about 12 - 24 hours, but sperm can wait. However, the options: the egg travels to the uterus after ovulation, and the time the egg is in the fallopian tube (where fertilization occurs) is short. But the correct answer here (correcting the previous thought) – actually, the egg is in the fallopian tube, and fertilization must occur before it moves to the uterus. The egg's lifespan after ovulation is about 12 - 24 hours, but sperm can live up to 5 days. But the options: 'by Saturday' – wait, no, let's re - evaluate. Wait, the original selected option is wrong. The correct answer should be 'by Saturday'? No, wait, the egg is viable for about 12 - 24 hours, but the time from Wednesday (ovulation) to Saturday is about 3 days. Wait, maybe the question's context: the egg is in the fallopian tube, and fertilization needs to happen before it reaches the uterus. The egg takes about 3 - 4 days to travel to the uterus? No, actually, the egg is transported to the uterus within about 3 - 4 days after ovulation, but fertilization must occur in the fallopian tube. The egg is viable for fertilization for 12 - 24 hours after ovulation. But sperm can survive for up to 5 days. So if ovulation is on Wednesday, the latest time to conceive (so that the sperm can fertilize the egg before it's no longer viable) would be within a few days, but among the options, 'by Saturday' (Wednesday + 3 days) is a reasonable time frame as sperm can survive and fertilize the egg before it travels to the uterus. The option 'a month later' is wrong as ovulation is a monthly cycle, but the egg from Wednesday's ovulation would have already traveled. 'By Thursday' is too soon (the egg is viable for more than a day, but sperm can take time). 'The following Wednesday' is a month later, wrong. So the correct answer is 'by Saturday'. But the original selected option was wrong. Wait, the question is about when they need to conceive before the egg travels to the uterus. The egg travels to the uterus over a few days (3 - 4 days), so fertilization must occur before that. So if ovulation is Wednesday, by Saturday (3 days later) is before the egg would reach the uterus. So the correct option is 'by Saturday'.

Answer:

C. by Saturday (assuming the options are labeled A: by Thursday, B: a month later, C: by Saturday, D: the following Wednesday)