My Female Guppy Gave Birth To 18 Fry

[NeonTetraFish64500]

My female guppy gave birth to 13 fry two days ago and gave birth to 5 fry yesterday afternoon. She still has a gravid spot so when will she give birth again?
Thanks!

 

[T.I.A]

It is uncertain when she will give birth again, as it is different for each fish. However, she may give birth either today or tomorrow - it can take longer.

 

[eaglesaquarium]

Female liverbearers generally take about 28 days between drops.