Baby Bed Bugs, or nymphs as they are correctly called, are bed bugs that are aging through the first of the 5 development stages.
(Each stage called an instar) The nymph must have 5 blood meals on its way to adult hood. After each blood meal as it grows, baby bed bugs will shed their exoskeleton described as exuviae (skin castings).
The normal time frame from nymph to adult is typically around 4-10 weeks or so. It can be four if they get a blood meal every week and the temperature is optimum. It takes about a week to complete each stage if the environment is perfect. Baby Bed Bugs create a lot of waste, droppings, and exuviae, as they grow into maturity. This waste can typically be seen when one is inspecting for bed-bugs. Use a flashlight to check for these signs. Since bed bugs tend to congregate in perfect hiding areas, there will also typically be a lot of adults, and baby bed bugs there also. Bed bugs can go up to 1 year without feeding, so they can survive a long time without a food source.
Since the female bedbug can lay up to 5 eggs every day, but typically lays 5- 7 eggs per week, she can lay a lot of eggs in her lifetime. She smartly adds a little bit of a glue-like substance that allows them to stick to multiple surfaces. The baby bed bugs will hatch out in anywhere between 6 and 17 days. They will be almost without color and about 3/16 of an inch and about the size of a pinhead. They too will be flat like their adult counterparts however just smaller. There will be a little dark spot which is where there head is at. The baby bed bugs will also look larger when they become engorged after a blood meal. Like the adults, they will appear reddish in color after they feed on blood. Here is a good read on bed bugs.
The female bed bug is actually a very well adapted insect. She can store the male sperm for up to 4- 6 weeks. Since the mating process in the bedbug world is very traumatic to the female, she will try to avoid mating again and will often try to move away from a colony. What that means to you is that the bed bug you bring home from that trip you took is likely going to be a pregnant female. She’s on the run from the rest of the males in the community. She can produce baby bed bugs by herself at this point as she already has the male sperm on board, and has the ability to create an infestation in your home or office. You can also set out traps to assist you in finding live and moving bed-bugs. A very cool idea recently to try and help combat moving bed bugs in luggage is here.