Can I use Viagra once for conception on ovulation day ??? Will it effect sperm or pregnancy?

I got erection on normal days but on ovulation days I have problem of erection . I know it's bcoz of stress and other thing.

I looking for an answer that if I use Viagra only of two or three days , will it effect the sperm quantity ,quality pregnancy , fertilisation , or anything else

I am having one baby girl and we are trying for a boy . I never used Viagra .

Please help me out and please provide good suggestion please

Me from India