Sex every day or every other day during your fertile window to get pregnant?

Brittany • Married with a beautiful son born April 2018
Some of my friends swear they got pregnant by having sex every other day of their fertile window because there's more sperm that way. Specifically, they said have sex on day 11, 13, 15, and 17. Other people said have sex every day for your best chance. And other people say multiple times a day, every day!! What do you ladies think? 

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