You could release her into the tank and keep the fry in the net. Like Colin_T already mentioned is that the stress of capturing her and putting in a small enviroment (the net in this case) may have lead to drop some fry. And in this case also some eggs. The eggs themselves have got nothing to do with stress. I know that a lot of people think that premature eggs that have been dropped are because of stress. But with ovoviviparous livebearers such as guppies pre-fertilization is at hand. This means that the mother to be has fed nutrients into the yolk before any fertilization has taken place. The amount of nutrients should be sufficient for the whole gestation period untill birth happens. An undeveloped egg/embryo means that there wasn't sufficient nutrient in the yolk to start with. So, those eggs would have never been able to develop to a fully developed embryo. But undeveloped eggs are easier to push out. It only takes a couple of days to develop into a fully devleoped embryos after fertilization. The remaing gestation time is needed to grow. This means that a female can drop fry earlier than the average gestation time as long as the embryos have already developed. The only difference will be is that the fry are smaller. This is how it works...