Can you conceive when not ovulating ?

Bish • ME: 31, TTC with first baby, from Dubbo NSW, LOVE animals, adore my 5.5 year partner. 🐶💜 Love life 💜🐶
Ok this may be a stupid question, but there have been lots of discussions between my friends and I around this topic. Can you conceive when not currently ovulating ? A lot have told me no. But when I read the Shettles method over trying to conceive what gender baby you want, it states, if you want to conceive a boy than lots of sex during ovulation. And a girl is 4-5 days before or after ovulation. 
So we can conceive when not ovulating ? 
If so, why do we panic so much during our ovulation days on the calendar and have the most sex then ? 
I'm still trying to learn all about this. Please help! 

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