I had a stray female that kept hanging around my house this winter. She was pretty feral and wouldn't come close to me. Finally after feeding her and talking to her for a few weeks she finally let me touch her. Well lo and behold she was pretty pregnant so I brought her inside. Took her to the vet and he confirmed she was pregnant. She wasn't able to get any shots or anything and I chose not to have xrays and just wait it out.
Well I waited and waited and waited. Everyday I woke up and would say this is the day. I made her a nice bed and watched for the nesting behavior. Once she started nesting I starting setting my clock to get up every couple of hours at night because I was so sure that each night was THE night. I read up on kittens I had everything prepared for multiples. And finally the day before Valentines day she came and got me and let me know it was time. It was 11 am in the morning. Her and I went through labor all day that day. I had my birthing supplies, baby bottles and formula ready incase there was too many to nurse. I had my scale and my note pad so I could mark which kitten was born in what order, what their birth weight was and what color they were I was ready!
Finally at 4:30pm we delivered kitten #1 Woohoo we were on our way now. I texted my MIL and ran down stairs like a crazy woman saying we have kittens! We have kittens! (my hubby just smiled and nodded at me like he always does, thinking to himself she has lost her mind) I was just so giddy and exicted to have these babies. Anyways I weighed it. Wrote all her information on my sheet I was ready to go now we were on a roll. So I waited for kitten #2. Knowing that they can take breaks in between babies I waited and was ready in 30 mins for kitten #2. I waited and waited somemore. Sigh ok I had read it could take a few hours for them to continue and as long as she wasn't laboring we were ok. She was nursing number 1 and sleeping in between no stress. So finally she got up and meowed at me This was it! Here comes kitten #2 I just knew it. Nope she wanted me to babysit so she could go potty <sigh> So it is now 9:30pm and I am worried so I call the vet and tell him we have no #2 yet and I'm worried. He says well hon she might not do #2 while she is in labor. I told him no no not that #2 we don't have kitten #2 yet. He asks me how she seems and I told him cool as a cucucumber I'm the nervous one. He tells me well as long as she wasn't bleeding and didn't seem stressed to let her go and call him first thing in the morning. Ok so there I sat all night waiting for #2 darn it I was ready for the whole litter I just knew there were more in there.
Morning comes and nothing nada zip. So I call the vet and tell them who I am and the girl says to me no #2 huh? My vet had told them I would be calling. So they had me bring the family in. We had her checked and xrayed and that was it just 1. 1 kitten. So now I am the proud owner of a very spoiled single kitten and her mother. (we decided to keep her too) I went out and bought baby toys, and stuffed animals because I felt so bad she didn't have siblings. She is 3 months old now and just such a joy. She has even won over my hubby and my cranky cat who hates all other cats.
Anyway sorry to ramble. I think I am still waiting for #2 lol. But anyways I think single kittens are more common than people realise.