A very happy birthday to you!
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A very happy birthday to you! Yes, you. 26th September is the most popular birthday in the UK, as well as the USA and New Zealand.
Take a look at a calendar and count backwards by 39 weeks to find out why...
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A very happy birthday to you! Yes, you. 26th September is the most popular birthday in the UK, as well as the USA and New Zealand.
Take a look at a calendar and count backwards by 39 weeks to find out why...
Now, we cannot say for certain that if it's your birthday today, you're the result of a Christmas Day shag. It's likely you might in fact be the result of a New Year kiss that became full-body. That's because the average pregnancy length of 40 weeks includes two weeks where you're not actually pregnant at all.
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Now, we cannot say for certain that if it's your birthday today, you're the result of a Christmas Day shag. It's likely you might in fact be the result of a New Year kiss that became full-body. That's because the average pregnancy length of 40 weeks includes two weeks where you're not actually pregnant at all.
Gestational age is calculated from the first date of your last period. Ovulation, and therefore having something to fertilise takes place approximately two weeks after that. So why is pregnancy generally counted at two weeks *before* fertilisation?
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Gestational age is calculated from the first date of your last period. Ovulation, and therefore having something to fertilise takes place approximately two weeks after that. So why is pregnancy generally counted at two weeks *before* fertilisation?
The thing is, it's very hard to tell exactly what's going on inside the human body at any given point. Sure, you can probably remember the date you had sex. But that doesn't mean it'll be the same date as the sperm reaches the egg and they fuse - that can take days.
And even if an egg is fertilised, it may or may not implant. If it does, there's no clear, obvious physical signs in everyone that it happens.
So overall, it's just more straightforward to count from first day of last period.
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The thing is, it's very hard to tell exactly what's going on inside the human body at any given point. Sure, you can probably remember the date you had sex. But that doesn't mean it'll be the same date as the sperm reaches the egg and they fuse - that can take days.
And even if an egg is fertilised, it may or may not implant. If it does, there's no clear, obvious physical signs in everyone that it happens.
So overall, it's just more straightforward to count from first day of last period.
But anyway, we digress. Given average lengths of pregnancy, if it's your birthday today, it's statistically very likely that your parents had a very merry festive period. Happy birthday!
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