Chance of getting pregnant naturally at age 50?

The odds of getting pregnant each month changes greatly as a woman ages. Her odds of conceiving fall most drastically between the ages of 35 to 40. Her chances of getting pregnant drop from around 25% at the peak of her fertility to less than 5% around the age of 40. ref: https://www.cnyfertility.com/fertility-stats-by-age/

If you are still ovulating at 50, there is still the chance of pregnancy. There has been pregnancies at this age but not many. The sperm viability or donor if one has to be considered. The chances after 40 plus are diminished but not impossible.