Consistently hatching more males than females

[PeepingK]

I feel like I’m consistently hatching out more males than females. It seems each time I do a hatch I will get 60-70% males. I thought maybe it was just a one time thing but this is my 5th hatch and only 6 out of 18 were female.

I had someone that was supposed to come pick up 7 chicks this morning but I couldnt in good conscience sell them to her (even though I advertised them as unsexed) because to me they are all looking like males.
I know that feather sexing isn’t that accurate but the males always seem to feather out slower than the females and that seems to be what I’m looking at right now. I’ll attach some photos of the the suspected males.
As you can see they all have stubby wings. I noticed that usually females will already have much more feather growth at this point than males.
Does anyone know why I keep hatching out so many males?

 

[Iluveggers]

@MysteryChicken can talk to you about feather sexing I believe.

 

[JacinLarkwell]

Your hens likely lay male heavy

 

[K0k0shka]

Probably just a lot of bad luck. It's still a small sample size, and may even out over time if you had more hatches and more data.

 

[PeepingK]

Probably just a lot of bad luck. It's still a small sample size, and may even out over time if you had more hatches and more data.

So this hatch turned out even worse than I initially thought. Out of the 18 chicks only 2 were female
I feel really bad because 8 of those chicks went to a family with kids and they’re all so attached to them already, and 7 out of the 8 are male.

 

[littlecoopnextdoor]

So this hatch turned out even worse than I initially thought. Out of the 18 chicks only 2 were female
I feel really bad because 8 of those chicks went to a family with kids and they’re all so attached to them already, and 7 out of the 8 are male.

maybe they can set up a little bachelor pad for the roos! if there are no hens they can all live together pretty harmoniously

 

[K0k0shka]

So this hatch turned out even worse than I initially thought. Out of the 18 chicks only 2 were female
I feel really bad because 8 of those chicks went to a family with kids and they’re all so attached to them already, and 7 out of the 8 are male.

My hatch from this year was 6 males out of 7, so I can sympathize.

 

[SourRoses]

I read that male embryos are better able to survive uneven / hot temperatures in the incubator because of the chromosomal differences.
In mammals like humans, it's the females who are more genetically robust.

So, are you disposing of enough undeveloped eggs that would account for the low female ratio? If so, a different incubator / methodology would be in order.
If you're not removing many undeveloped eggs, then it is genetic.

 

[Perris]

then it is genetic

how could genetics produce anything other than 50-50 male-female on average?

 

[raingarden]

Are they all sired by the same rooster?