If you have a drug free birth and let your body do what it is supposed to you won't rip. I had two natural vaginal births and didn't rip with either my first weighed 5lbs 12oz and my second 8lbs 2oz
I've been told panting instead of pushing while baby is crowning helps the skin stretch more slowly making it less likely to tear. However, I had second degree tearing and I healed pretty quickly despite all my stiches. It's not too bad.
Ive read that the months upcoming to your due date you should massage coconut oil on the outer part of the whole in a stretch like motion. Sounds weird but im almost 6 weeks and I'll be doing that. Also put it on the nipples to prevent cutting when yu breastfeed. I rub it all over myself at night for stretch marks too. I love coconut oil.
I had my son naturally and I didn't do anything special for it and I didn't rip. I guess it depends in how your body reacts
You could try the massage exercises when your closer that the doctor does. Look it up.