belly getting big-how long?

I put my queen in with my stud and it didn't take the first time but it must have taken the second time I put her in. My problem is that she was in with the stud for so long that I don't know at what point she got pregnant.
I thought she was not pregnant but then about a week or so ago she started "showing" and her belly is getting really big really fast. For those breeders more experianced then me-how long does it take to have the kittens, generally speaking, after the queen starts showing? If I can remember correctly my queen started show only about 2 or so weeks three at the most before she gave birth.

most i have had the pleasure of birthing, showed heavily 2-4 weeks before birth..

I am a siamse breeder. The gestation depends on the breed. The average cat has a gestation of 63 days. Siamese can go up to 73 days gestation with no complications.

Originally Posted by megmar6853

I am a siamse breeder. The gestation depends on the breed. The average cat has a gestation of 63 days. Siamese can go up to 73 days gestation with no complications.

Click to expand...

thanks but I know what the gestation length is I don't know when she "took" so im trying to figure out how far along she is in her gestation.