Oral sex yes or no??

Pauline 🌈 • Eleven angels in heaven. "Somewhere, over the rainbow, skies are blue..."
We are ttc our first and read somewhere that blowjobs can decrease your chances of getting pregnant...has anyone asked their doctor or had any experience with this? It's usually a major part of our sex lives and my hubby is such a trooper for our fertile week..makes me sad that this may have to be left out this week!