When will my Molly give birth?

TatteredOcean

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Jan 25, 2017
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A few days ago I got a black Molly from petsmart and I put her in my tank with two other female Mollies. I am positive that she is pregnant but I'm not sure how far along. How far along does she look?

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It is difficult to tell, but you can usually tell when they're within a few days as they stop eating. I think gestation is around a couple of months. But I'm not sure.
 
She's not been eating much and has been hanging around the heater and in the back corner behind some plants. She also has a white bump near her anal fin, you can see it pretty clearly in the picture I've attached.
I plan on getting some hornwort tomorrow so when the fry are born they have somewhere to hide

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The gestation period for black molly's is about 4 weeks, but sometimes they can carry their young a bit longer.
Also, as with many/most live bearers, they often come with a 'payload' and can have multiple broods from a single fertilization.
 
I got her nearly two weeks ago(the second picture was the day I got her) I think she was maybe close to 2 weeks pregnant when I got her. I think her belly is started to get squared off but I'm not sure. This is the most recent picture I have of her it was taken about two days ago.

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