9/9/2023 0 Comments Conception to due date chart![]() ![]() Since the connection between mom’s gestation length and her baby’s was twice as strong than for dads, mom’s genes appear to have twice the influence over birth weight and gestation length than the father’s. The authors suggest that fathers may pass down their fast growing baby genes and thus influence the timing of birth.Įven though this observation didn’t hold true for moms, both parents showed a positive correlation between their birth weight and baby’s birth weight and the gestation length for both mothers and fathers correlated with the gestation length of their babies. ![]() For fathers, if dad was born at a higher birth weight, this correlated with a decreased gestation length for his baby. The researchers combed the Medical Birth Registry in Norway to gather birth data for two generations and from this massive data set, they found that several aspects of delivery date correlated with heritable traits from both the mother and the father. In that study, researchers looked at how mom and dad affect length of the pregnancy-the date at which baby naturally exits mom’s body. The data in our better due date calculator uses insight from on a 2006 study. To compensate for this, we gave mom’s genes a little more weight in the equation.įor those of you still hanging out for further explanation. slow babies but also how much room does baby have left towards the end of pregnancy-there is some evidence that babies trigger labor when they feel too crunched. Now to further complicate things, your body size (assuming you = baby carrier) also has a lot to do with baby ejection date. How many weeks before your due date were you born? How many weeks before his due date was sperm dad born? This will give you some clues as to whether your baby will be ready to join the world on the early side or late side of your due date. To try to get around the growth rate conundrum, you’ll have to consider whether or not you and the genetic dad were fast babies or slow babies. How early/late you were born and early/late sperm dad was born (factor in gestation lengt h genes) This range in growth rates across our silly species means that the natural variation for a “true” due date is up to 5 weeks. The adjustment will be based on how big or small your growing baby is.Įven if you know the exact date of conception (beyond the silly period proxy) and you have general idea for how big/little baby is at a certain point, here’s another wrench to throw in the works… Not all babies grow at the same rate! I know, that blew my mind too! This doesn’t tell the whole story, of course, and there’s a good chance that your doctor will adjust your due date once baby has their first anatomy scan. Most due date calculators (including your doctor’s first due date calculator) will use this as a proxy for when you released the egg from your ovary and it started its little journey towards conception and baby. Why these three data points?-The science behind our better due date calculator: Check out our Preterm Birth Prediction Tool. ![]() So we purposefully left them out.īUT, if you are curious about your preterm birth risk, we have you covered. This due date calculator does not include risk factors for preterm birth or a history of preterm birth (hence only included -5 weeks to +3 weeks in the calculator- we gave a little extra wiggle room because, if you’re like me, your parents probably had an even rougher estimation of their due date).įactoring in variables that are linked to preterm birth risk can skew due date data in a way that doesn’t make a whole lot of sense for most women. ![]()
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