Experiences For Sibling Attempts?

Hello,

My partner and I will soon begin trying for a sibling for our son who was conceived through artificial insemination. It took two attempts to get our son and we werw curious to see if it was easier or harder trying for a sibling? Did it take longer? If it matters, I have lost all of the baby weight and plus an additional 20 pounds, so I am much healthier this time around than last and when we attempt our son will be 18 months, so plenty of recovery time.

Thanks!