I went ahead and moved the thread for you. Best advice I can give is to just be observant. Write down anything out of the ordinary and include dates so you can later look back and learn your timelines. Pay special attention to the female and record changes in behavior. Make note of shifts in activity/feeding, how and where she lays, her general body shape, etc. Finally, don't pair your snakes unless they're in good shape - if skinny or overweight, fix that issue first.