We weren’t actively trying, but not doing anything to prevent it any more as I’d just started in my first job after grad school. We’ve always said my wife got morning sick on the first morning after. Could the pregnancy actually have started a couple of days earlier? Sure I suppose so, but that’s not our family story. She was famously morning sick for months.
You and your wife had a lot more sex than my husband and I had.
And I knew when I was fertile. And I felt different the next morning. And the dates I thought I’d conceived exactly predicted the birth date – both times.
(And the doctor doesn’t subtract “nine months”, there is a mean number of days for human gestation. It happens to be about 9 months.)
Were you planning on using a sperm donor prior to his involvement?
We do. We had decided to start a family. She injured her back and couldn’t do anything for a few weeks. By the time we could try again, she had learned she was pregnant.
I once heard of a story where a couple was trying to conceive. The wife kept track of her temperature and stuff and when she was ready, she drove out to her husbands workplace (he was a construction foreman) and they hopped into the back of a truck. 
No, no. I just knew I wanted babies. So I was on the lookout for a baby-daddy.
Story time–not for my kid, but a friends.
At the time, I was a projectionist, and it was one of those Thursdays that you don’t get to go home until 5AM the next morning. So needless to say, when I got a phone call at 0700, I was not in a good mood. " WHO THE #«ĦɸΔЋ IS THIS" and I heard “Vorlon, guess what?”. This caused the mental Rolodex to spin to sarcasm, and I croaked out “Don’t tell me, she’s pregnant.” Dead silence, followed by “How did you know?” I added then “I’m going back to sleep, I call you when I can think”.
Fast forward a few months and I’m helping the happy couple move into their first apartment and the soon to be gravid wife had just returned from the OB, conception calculator wheel in hand. We were taking a break and she put in the dates, and grew very wide eyes. She kind of dropped the device in my hands as she doubled over in laughter, I looked, and when I realized the date, I looked at her and we both broke up, rolling on the floor. Soon-to-be Papa was now thinking we had both lost our minds. He was still looking at us weird when I managed to croak out “Fourth of July”, but understood when his better half managed to get enough air in her lungs to blurt “FIREWORKS!”
People who are coming up with exact dates weren’t in your situation. They were mostly in situations where the couple was separated except for one day/weekend, or where there was otherwise only a single encounter that could have resulted in pregnancy. I’d be willing to bet that many parents with children born 11 months apart know exactly when they conceived.
We didn’t plan for our first daughter. It worked on the first try which was great but, due to our lack of planning, our baby was born right at what was also by far the busiest time at work. As a result those first few weeks were one wild roller coaster.
We learnt our lesson and planned for our second baby. I’m almost certain that it also worked on the first try (positive early symptoms) but for some reason it didn’t catch. We tried again the following month and nine months later, daughter#2 was here. I sometimes look at her and think that she would not have existed at all had the previous attempt worked. It’s unsettling.
Yeah, I’m not getting that part either. “We were trying for 3 months, and I know the date” How do you know it wasn’t the day before or the day after?
In my case, I don’t know when my son was conceived since we were trying daily. But I know the exact day my daughter was conceived since it was the only time we didn’t use a condom after my son was born. Night before my birthday, 2003 
First one was random, though expected.
Second one was carefully timed in a successful attempt to ensure both fertilization & gender, by my secret use of an app that was actually designed to inform me about my wife’s menstrual cycle, rather than her fertility.
Apparently the Shettle’s Method is not the “old wives tale” I thought it was - I asked our gynae for her opinion.
It’s a metric expression = 6 kilos, 11 grams. That’s like 4 pounds.
The cutoff date for enrolling in school is I think August 1rst so we didnt want our kids born August thru say November so they would miss out on getting into school when they turn 5. Being born May-July is the best since they will be a bit older in school.
Family planning.
If you have a good understanding of the biology of human conception, you are making a conscious effort to maximize the likelihood of pregnancy, and the woman’s cycle is very regular, there is nothing strange at all about knowing the exact date of conception. Incidentally, having constant sex isn’t the best strategy if you are tracking ovulation. Best to abstain for 2-3 days until shortly before ovulation, then go for it. If you employ that strategy (we did), you can narrow down the date pretty damn well, especially if you don’t have sex every day during the brief window of fertility.
I think this is the part they are questioning. When we were aiming for a certain month we tried at least every day for a week and we were 2 for 2. The exact day would be hard to pinpoint but we knew we didn’t want to wait another month so we made sure.
Just gonna leave this here:
For our first, it took a bit longer than we expected, so my wife went to see a fertility doctor. The doctor was new to New York and trying to build up her clientele, so I think we got a good rate.
Anyhow, she started running her tests and was like “Oh…it appears your are actually already pregnant…I’m going to count it!”
That’s good info. But I thought people here were talking about the date “the act” happened, and not necessarily sperm going into the egg.
Yes, good point. In my posts I’m actually referring to “the act” rather than the conception date, which could have been slightly different since sperm don’t die right away and can wait around a little bit for an egg to show up. But I wrote as if having sex and conception are the exact same thing/occur simultaneously. Lack of precision on my part.
We don’t the know the exact date for any of the times.
For our first son, we were new in the relationship and making rabbits jealous. Who knows which of those was the lucky one.
For the other pregnancies, there were also multiple attempts while she was fertile.
The people I know who know the exact days are like my friend. They were using condoms but got frisky in the car and had unprotected sex once…