Baby Bed Bugs (Nymphs) The first thing a newly hatched baby bed bug does is search for a blood meal. Baby bed bugs (technically called "nymphs") go through 5 stages of development instars. So a 1st instar nymph is a "newborn" and a 5th instar nymph is a "bedbug teen", so to speak.
From first instar nymph and into adulthood, the developing bedbug needs a good supply of blood before moving into the next stage. An adult bed bug can produce eight eggs per time and as much as 500 eggs during her lifetime!
After 10 days, the eggs laid by the females will hatch to produce what is called a nymph or an immature bed bug. These nymphs are extremely small in size and come up to be about 1.5 millimeter. Bed bugs pass through five nymph growth stages before they develop to become a fully grown adult.
Nymph life In this early stage of the bed bug life cycle, the clock is ticking for these tiny nymphs to find a blood meal. "A first-stage instar bed bug can only go an average of 20 days without
Juvenile, first stage nymph bed bugs are about the size of a pinhead and have translucent bodies. These nymphs gain color after feeding, but they are hard to see before a blood meal. These nymphs gain color after feeding, but they are hard to see before a blood meal.
Bed bugs have "true bug" characteristics which include antennas, segmented bodies, and six legs. The various sizes of nymph shells are roughly as follows: First stage nymph is 1.5 mm Second stage nymph is 2 mm (which is roughly the size of a pinhead)