I have read loads on this very subject. It seems that there are as many opinions as there are women out there lol. The most consistent advice I've gotten or rather read about was that the three days before ovulation is the best time to have intercourse.
Here is a good article worth reading:
https://www.justmommies.com/getting...es-getting-pregnant/best-time-to-get-pregnant
The day of ovulation: You might have heard or might believe that the best day to get pregnant is the day that a woman ovulates. It is important to know when you ovulate and to try to time intercourse close to ovulation, but the day of ovulation is not the best day to get pregnant. Researchers have studied the timing of sexual intercourse in relationship to ovulation in order to determine which days are the most likely to result in pregnancy. Surprisingly, according to research published in the Journal of Reproductive Medicine, what they found was that the day of ovulation was not the best day of a woman’s cycle to conceive.
The day before ovulation: Interestingly, the day before ovulation is actually a better day to conceive on than the day of. This may be because sperm that are ejaculated the day before ovulation have had time to mature and reach the egg.
Two days before ovulation: Even more interesting, researchers have found that a woman’s chance of conceiving two days before ovulation is just as likely, if not more likely, as the day before ovulation. What this means for couples trying to conceive is that timing intercourse to occur a couple days before ovulation and the day before ovulation will give them the greatest chance of conceiving.
Three to four days before ovulation: You may have thought that timing intercourse 3 to 4 days before ovulation would cut your chances of getting pregnant, but actually having sex on either of these two days will give you a better chance of conceiving than having intercourse on the day of ovulation.
Five days before ovulation: The first day of a woman’s fertile window may also result in conception but realistically the chances of conception are best starting at 4 days before ovulation through the day just before ovulation.