Average day of spontaneous labor vs. age of mother at time of birth

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I read somewhere that maternal age has something to do with when labor sets in, so I included it in the survey. I found nothing terribly interesting or conclusive.

This sort of validated my decision to keep the survey simple and not consider every little thing in the world that people are curious about. Could the average day change depending on your age, ethnicity, whether you were on the pill, country of origin, etc? Maybe. But we're talking about something where with a standard deviation of over a week here... about the same number of people give birth on day 279 as on day 287. So if some random thing changes the average by 2 days will that knowledge help make your due date any more accurate? I'm thinking no.

Data table - Average lenth of pregnancy per age

Age# of participantsAverage day of spontaneous laborAverage day including ± 1 year of age
12 1 29041W,3D27739W,4D
12.5 1 28741W,0D27739W,4D
13 2 26437W,5D27238W,6D
13.5 1 28340W,3D27138W,5D
14 1 27339W,0D27339W,0D
14.5 3 26337W,4D27439W,1D
15 10 27038W,4D27539W,2D
15.5 13 27739W,4D27539W,2D
16 24 27639W,3D27539W,2D
16.5 27 27739W,4D27539W,2D
17 69 27539W,2D27539W,2D
17.5 55 27639W,3D27639W,3D
18 69 27339W,0D27639W,3D
18.5 80 27639W,3D27639W,3D
19 108 27639W,3D27639W,3D
19.5 110 27639W,3D27639W,3D
20 124 27639W,3D27639W,3D
20.5 163 27639W,3D27639W,3D
21 158 27739W,4D27739W,4D
21.5 154 27739W,4D27639W,3D
22 180 27739W,4D27739W,4D
22.5 166 27739W,4D27739W,4D
23 179 27639W,3D27739W,4D
23.5 182 27839W,5D27739W,4D
24 174 27939W,6D27739W,4D
24.5 205 27639W,3D27739W,4D
25 199 27739W,4D27739W,4D
25.5 187 27939W,6D27839W,5D
26 209 27739W,4D27839W,5D
26.5 225 27839W,5D27839W,5D
27 272 27839W,5D27839W,5D
27.5 280 27839W,5D27839W,5D
28 264 27939W,6D27939W,6D
28.5 269 27839W,5D27939W,6D
29 301 27939W,6D27939W,6D
29.5 294 27939W,6D27939W,6D
30 273 27939W,6D27939W,6D
30.5 279 27839W,5D27939W,6D
31 258 27939W,6D27939W,6D
31.5 231 28040W,0D27939W,6D
32 237 28040W,0D27939W,6D
32.5 235 28040W,0D27939W,6D
33 200 28040W,0D28040W,0D
33.5 173 28040W,0D28040W,0D
34 174 27939W,6D28040W,0D
34.5 132 27939W,6D28040W,0D
35 98 28040W,0D28040W,0D
35.5 86 28140W,1D28040W,0D
36 73 28040W,0D28040W,0D
36.5 73 28040W,0D28040W,0D
37 61 28240W,2D28040W,0D
37.5 53 28040W,0D28040W,0D
38 57 27939W,6D28040W,0D
38.5 47 28040W,0D28040W,0D
39 38 28140W,1D28040W,0D
39.5 38 28040W,0D28040W,0D
40 36 28140W,1D28040W,0D
40.5 23 28140W,1D28040W,0D
41 51 27939W,6D27939W,6D
41.5 47 27839W,5D27939W,6D
42 36 27839W,5D27939W,6D
42.5 21 28040W,0D27839W,5D
43 30 27839W,5D27839W,5D
43.5 20 27739W,4D27839W,5D
44 13 27439W,1D27839W,5D
44.5 15 28140W,1D27839W,5D
45 10 28140W,1D27839W,5D
45.5 9 27639W,3D27839W,5D
46 1 28640W,6D28040W,0D

Due Date Survey Data

Due date statistics: A study on the length of pregnancy
Probability of delivery resulting from spontaneous labor after 35 weeks
Probability of delivery within x days of a given date
Length of pregnancy by week
Spontaneous labor and due date determination
Length of pregnancy, comparing subsequent births for individual moms
Length of pregnancy for first time vs. second & third time moms
Length of pregnancy, type of delivery
Gestation vs. Birthweight
Probablity of Induction after a given day
Average day of spontaneous labor vs. age of mother at time of birth
Are more babies born during a full moon?
What's the most common day of the week for babies to be born?
I'm still pregnant at 40W. What's it mean?
Do winter babies arrive later?
What if I know my conception date?
Are boys or girls born later?
Subsequent pregnancy date search
How do inductions bias the due date statistics?
Birth Stories
Survey input dates

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How NOT to help parents with a newborn

Fri Jun 17 11:43 AM by Gnarlbanya in Pregnancy & Parenting

Don't show up empty-handed. Getting out of the house to the shops when you have a newborn is so hard, so anything that means that you don't have to is super-helpful. Bring some spare packs of baby wipes, or a new onesie (so that the washing can be put off another day) or an easy to heat meal.

And don't tell people to sleep when the baby sleeps. Believe me, people will do this if it's an option. But if the baby only naps in the car or in the pram, and moreover, wakes as soon as the car or pram stops moving, this kind of advice is totally unhelpful.

minimalist kids birthday parties

Sun May 15 9:19 PM by melsbells in Pregnancy & Parenting

For the first two birthdays, we tried to make some special food and splurge on interesting fruit. If I lived closer to friends, I would want to throw a get-together as an excuse to see my friends, celebrate our survival of another year. I don't think my kid would actually be into that though. They are turning out to be quite introverted and shy.

7th Birthday - Theme Suggestion

Mon May 2 8:18 PM by melsbells in Pregnancy & Parenting

I met a kid about that age who had a geo-caching birthday party and another one who had a roller-skating party. Both sounded awesome. The first one sounded like a whole lot of work to put together.

test out my new name picker

Fri Apr 15 11:41 PM by rowan in Pregnancy & Parenting

my neighbor's dog is named Gunner? Makes more sense for a bird dog....

Sperm Can be Cultivated from Skin Cells

Thu Mar 10 6:56 PM by rowan in Pregnancy & Parenting

Pretty sure this was a spam post but the post itself is kind of interesting. Maybe it could go to Sci & Tech, though it has relevance here as well. I added a link to the Science article, in case anyone wants to read it.

it gets better thread for parents

Mon Jun 13 11:16 PM by rowan in Pregnancy & Parenting

Sometimes I think they go through a growth spurt or something weird-ass like that and then when it's done it gets better again. But who knows, kids are weird. It will get better again. We seem to be having night terrors again though not as badly as before. Those seem to correlate with growth spurts (for us). They are tailing off again so hopefully...?

Pregnancy Guidebooks for Cool Moms (humor)

Wed May 11 3:39 PM by rowan in Pregnancy & Parenting

One of my friends is part of this magazine. She didn't write this one but it's pretty hilarious.

http://theoffingmag.com/wits-end/pregna ... cool-moms/

Anyone want to come up with our own "Guidebook" titles?

the one about inducing labor by setting your hair on fire is my favorite

stuttering at the end of words

Thu Apr 28 9:21 PM by Sonic# in Pregnancy & Parenting

I don't think it's a cause for immediate concern, but my experience would lead me to talk to a doctor about it. I didn't have a stutter when I was 2. I had language delay. I didn't learn language when kids typically do. Needless to say, I was a very frustrated little kid. When my parents and my pediatrician caught on to it, I had to spend a few years seeing a speech pathologist.

I've read that stuttering is at least partly psychological, but I really can't say more than that. If nothing else, I'd just want to know that his frustration is a necessary part of development like teething and not something that can be avoided.

Criminalization of drug use during pregnancy to end in Tennessee

Tue Mar 29 2:48 AM by Amuro in Pregnancy & Parenting

Actually I think it would be better if the penalty was rehab and being sent to a therapist. It's pretty dumb to criminalize it especially because there is an almost certainty custody will be taken away. Why not try and fix the problem with addiction so there is less of a strain on social services. There should be increased awareness but what idiot doesn't know drugs are bad for you and worse if your pregnant. If you are addicted to drugs you obviously are thinking about getting high and that's about it.

Why have children if you want to work (aka it's 1950!)

Tue Mar 8 9:16 PM by antfancier in Pregnancy & Parenting

I just had a look at your article. :thumbup:
As you say, many comments have been deleted, but that's probably for the best otherwise I'd get mad.

I'm about to have my first child and have had some similarly surprising responses from people when I explain I'm going to be a SAHM; everything from admiration to unsolicited suggestions that a nanny is better than daycare. When I explain that the reason is that I acut ally want to work but my earnings from my two part time jobs would barely cover childcare, it always gets awkward. And then they suggest the whole home daycare/nanny thing again. Even if I could afford it, I'd rather choose the daycare because they have facilities and resources that I don't (I live in a basement apartment, with pretty minimalist furnishings).

I get it. People have strong beliefs about what is 'best', but it's not a one-size-fits-all scenario. And holy crap! If a woman wants and is able to work after having kids, why on earth shouldn't she?

Kids are full of LIES

Sun May 22 2:29 PM by rowan in Pregnancy & Parenting

Don't be silly monk, everyone knows a good conglomerate goes better with milk

young kids, consent and bodily autonomy

Mon May 2 8:46 PM by monk in Pregnancy & Parenting

I think it depends on the child. Do you ask a newborn if it needs it's diaper changed? Obviously no. Do you help a 13 year old get dressed? Obviously no. Somewhere in there the child matures to the point where they should learn that they own their bodies even if they don't have all the privileges an adult does. This age is going to vary wildly between different children (by widly, I would say 3 year range). I would guess that some kids might be ready for this lesson as early as 3 while others not until they're about to go school. Actually that's a pretty good benchmark, because if you're going to put them in a group with other kids they don't know they should know the rules about touching or being touched.

As far as kissing Grandma, maybe they shouldn't have to do it, but making them do this social communcation helps get them ready for all the other social communication that will be forced on them later. Plus, grandma needs that love to help HER be healthy.

Umbilical cord

Wed Apr 27 1:26 AM by antfancier in Pregnancy & Parenting

There's a Bulgarian tradition about the umbilical cord my friend told me about. When the dried little stump falls off your baby, you're supposed to throw it in a place that reflects your child's future, or at least the future you want for them. My friend threw his first son's on to the pitch at a Yankees' game and for his second son he threw it at the stage during a concert!

When my son's cord fell off a few weeks ago, I put it on the counter next to his changing pad then promptly forgot about it. I've no idea where it is now.

Pets and newborns

Tue Mar 22 2:34 AM by codingchemist in Pregnancy & Parenting

It's really obvious that the dog is stressed out by the toddler and I'm worried about the times when the kid is showing too much interest in the dog and we're not paying enough attention.

Yeah-stressed out dogs can make for stressful times with toddlers. Toddlers just want to pet and hug, and don't want to listen to pleas to leave the dog alone. We wound up getting an automatic treat dispenser and giving the dog relaxation exercises behind a barrier. So now when the toddler is running the length of the house screaming, the dog can be behind the barrier staring lovingly at her treat dispenser, instead of trying to herd the kid. Of course, it isn't really feasible to keep the dog behind the barriers at all times, but at least it gives us some breaks.

Our behavioralist also recommended Prozac, which took a long time to get the dose right, but has helped the dog be less reactionary and neurotic.

Party For My Mom

Thu Mar 3 10:36 PM by curlybae in Pregnancy & Parenting

Hi! It's a great idea to throw a party for your Mom. So yeah, invite her good friends and those who she hasn't seen for quite some time already. Prepare some healthy food or you can get a caterer for this tell them to prepare your mom's favorite dishes. Set up a good sound system where they can opt to dance or sing their old fav songs. Request her friends to prepare a great birthday greetings and i'm sure she won't forget this event.