Skip to main content
4848OneShop

🔥 ZakGT: Buy today with special price — limited stock!

📅 Guppy4 min read

Guppy Pregnancy Timing — Precise Due Date Calculation

Gestation is 26-32 days. Here is how to pinpoint delivery within a 48-hour window.

By 4848 One FarmPublished April 21, 2026

Gestation Length

Average 28 days at 78°F. Warmer water (82°F) shortens to 22-25 days. Cooler water (74°F) extends to 34+ days.

First-time mothers sometimes run long (up to 35 days). Experienced females are more predictable.

Visual Milestones

Days 1-10: gravid spot faint gray, belly smooth.

Days 10-20: spot darkens, belly begins rounding.

Days 20-25: spot dark black, belly square.

Days 25-28: belly very full, eyes visible through gravid spot, female hides.

Behavioral Signs

48 hours before birth: refusal to eat, active hiding in plants or corners.

During labor: female "twitches" or quivers periodically. Stays in one spot.

Setup Timing

Move female to birthing tank 3-5 days before expected due date. Too early stresses her; too late risks delivery in main tank (fry eaten).

#guppy#pregnancy#timing#birth#calculator

Related Articles

Ready to get your fish?

Browse our catalog. Every order includes our DOA guarantee and expert packing.