Meet the Other Phone. A phone that grows with your child.

Meet the Other Phone.
A phone that grows with your child.

Buy now

Please or to access all these features

AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Is a 20 months gap considered small in siblings

53 replies

Vibted7777 · 17/01/2026 22:58

Or average

OP posts:
VikaOlson · 17/01/2026 22:59

Quite small you haven't given your body a chance to recover.

Clumpled · 17/01/2026 23:10

I'd consider 24 months totally normal so on the small side but not unusually so.

MrsMillyFluff · 17/01/2026 23:13

I would say yes. My dd's have a 22 month age gap but because of their birthdays they were the year above and below each other at school. I found this a positive thing, not negative in the slightest.

MrsMillyFluff · 17/01/2026 23:14

I mean it would be considered average sorry.

PurpleLovecats · 17/01/2026 23:15

my first two are 15 months apart, it was my favourite age gap of the four. I had Caesarian’s with all of mine, no issues.

TheNightingalesStarling · 17/01/2026 23:16

Smaller than average age but not small. That would be less than 18 months. Under a year would be tiny

KnickerlessParsons · 17/01/2026 23:18

18months between mine and they were very close growing up.

Alwaystired23 · 17/01/2026 23:21

There's 18 months between me and my sister. 21 months between my dcs. I guess it's not a msssive gap.

ChildrenOfTheQuorn · 17/01/2026 23:23

Small. You should be leaving your body 18 months to recover before conceiving again.

Namechangwbillionthtime · 17/01/2026 23:23

MrsMillyFluff · 17/01/2026 23:13

I would say yes. My dd's have a 22 month age gap but because of their birthdays they were the year above and below each other at school. I found this a positive thing, not negative in the slightest.

Mine are 22 months apart but on is beginning of 2015 and the other is the end of 2016, mine are in yr4 and yr6

I think 20 months / 22 months it too small of a gap. You'll have a toddler and a baby at the same time, it can be really hard at times

My youngest was a lovely surprise I wasn't expecting, but it was never my intention to have them so close together. I wish I'd left it longer so I had more time one to one with each child, people tend to think their older child is more grown up than they actually are once they have a tiny newborn too

My friend has a 4 year gap between each of her children and it's worked our really nicely, each child gor a large chunk of time with just their mum while the others were at school ( or not born lol )

Ella31 · 17/01/2026 23:24

There will be 12 months between mine. Due in April. Awaiting the madness to come but excited all the same.

user2848502016 · 17/01/2026 23:32

Anything under 2 years I would consider small

CakeIsNotAvailable · 17/01/2026 23:40

I'd say under 2 years apart is a small age gap, but that's no bad thing. I had 13.5 months between mine and it has been fabulous. My children are the best of friends, and they are easier to parent because they're at a similar developmental stage and have similar interests. The small age gap was also very efficient in terms of childcare and minimising the impact on my career. I did find it tricky when they were both toddlers, but the age gap was great when they were babies and it's great now they're both at primary school.

If you're expecting and your age gap is 20 months, I'm sure you'll find lots of positives, even if it's tricky at times 😊

Allswellthatendswelll · 17/01/2026 23:41

My very subjective view:

Under 2 years smallish
2-3 years average
4+ years largish

Mine are 3 years 9 months so larger end of average. I like it. Most people like the gap they have though. So just do what's best for you.

Sparrow7 · 17/01/2026 23:43

My kids have a nine minute age gap so no, doesn't seem too small to me 😂.

cadburyegg · 17/01/2026 23:43

It’s definitely on the smaller side but not unusually so. My two are 3 years apart and I’d say that’s bang on average, I know lots of people with similar gaps.

Celestialmoods · 17/01/2026 23:44

It’s very common for children to be two years apart at school. 22 months is a gap on the smaller end of the scale, but not by much.

WinnerWinnerChickenDinnner · 18/01/2026 00:00

Seems normal to me. My sister thinks 5 years is a good gap but not me. I wanted all the teething and diapers over with as quickly as possible.

Snugglemonkey · 18/01/2026 00:15

It is crazy small to me, but only because due to fertility issues/ivf, we ended up with a gap much bigger than we would have chosen.

It worked out well because each child got a lot of individual input.

I don't think there is a right here, just what works for you.

TimetodoEverything · 18/01/2026 00:18

A little smaller than average.

I had a 20 month gap, I’m sure it was a million times easier than a 15 month gap. But I also remember there being a big difference in my child at 20 months vs 24 months and thinking how much easier a 2 year gap would have been. Most people I know had 2 to 3 years gap, or 4/5 years if they were trying to spread the cost of nursery.

Mine are one school year apart, which made life a lot easier when they were younger.

Onbdy · 18/01/2026 00:24

Mine are 14 months apart. It was hard at first with two babies in nappies, not walking etc but after that it was easy. It meant I got that stage over with quickly. They grew up together and have always been really close.

GertrudePerkinsPaperyThing · 18/01/2026 00:28

Yes it’s a small gap. I would say two years is the lowest end of “typical”, with anything between 2-4 years being in that category.

That said, there’s nothing wrong with it as long as you feel fit and able to have another baby after that time.

Equally nothing wrong with a bigger gap. Mine two are 5 years apart just because that’s how things worked out.

tescofishcakes · 18/01/2026 01:02

Mine are 20 months - one school year apart. They’re the best of friends and always have been, now they are 17 & just 19. It was tough when the second was a newborn and my eldest wasn’t even 2 and hadn’t been walking long but generally got easier as time went on. I don’t know many people with a sub 2 year gap, most people’s are between 2-3 years imo. I was the first in my group of ante-natal friends from my first to get pregnant again.

TardisGirl81 · 18/01/2026 01:09

Mine are 16 months apart. Both C Sections, no issues. They are now 18 and 17 and really close. My brother is 17 months younger than me I think it’s a good gap personally as they entertain each other and they are roughly at the same stages at the same time

Clumpled · 18/01/2026 07:51

Perhaps mine are unusual but I have a 2.5 year gap and they are incredibly close and into all the same stuff, able to do all the same activities etc. I literally have to buy 2x everything for Christmas presents otherwise there would be issues. In that respect, I see no difference with to our close friends who have a 16 month gap. Bear in mind when there are children at school who are one, two or three school years apart the gaps can be pretty similar depending on when their birthdays fall in the school year but by and large once they are primary age you don't notice that. Just saying this as all the comments about 'mine are 18 months apart and very close' apply equally to my 2.5 year gap.

I'm very curious as to why you're asking the question though? Does it matter if the gap is considered small?