Is this a male preflower

Can't see anything in the picture that looks like a male flower, but it isn't real clear either. If you go to week 7 in my diary "cannabis conundrums", I have posted pictures of male and female pre-flowers, as well as hermie flowers, and these pictures may help you to know what to look out for.

Definitely female. Bit overexposed to see everything, but those are definitely stigmata (female anatomy) About the off-topic response you got - wow, that's a lot of bad info. No spots, so less likely mg-related. I don't see clawing in this picture, either, do you? I could be wrong. Also, droopy plants after lights out is normal plant behaviour. Turgidity reduces in absence of light. There's no reason to hold its leaves upright when their is no light, so the plant droops. If it droops the last 2-3 hours of your light-cycle, that would potentially correlate with too much light. simply add up umol/s of your 2 lights. divide by meters-squared. this is a rough ppfd. reference that value along with hours of operation to find DLI (google DLI table). If its 40 or greater, that's potentially the cause of the very mild chlorosis you see in some of the top leaves. you want 35-40 dli, but even that requires some observation and adjustment. It's just a good starting point then you verify with proper resulting growth patterns. The relevant variables make the "max" DLI you can give to be potentially different in every garden. Everyone has to go through that trial and error due to local variables. more is not better for just about anything we do. rather a goldielocks zone is what you want to seek for lights, temp, heat, fertilizer etc... all should jive with each other. if you are using 2 600w lights, that is a real concern you should look into. do the math or recognize the odd growth patterns that result fro too much light -- new nodes will be absurdly close together and very little to no internode (aka the stem between 2 nodes) length develops. foliar sprays are good for extreme circumstances. if feedingn aplant properly there is never a reason to do it. it's one of those things that make some people feel like they are giving 110% but totally unnecessary when properly fertizing the plant and any slow progressing issue can be fixed with a tweak to fertilization. Don't needlessly clog up the stomata. That will only reduce co2 intake and CO2 is the limiting factor for growth. 1 for 3 on the offtopic concerns.. LOL i guess if you throw everything at the wall, something will stick.

Hey. So I see a 2 main issue here. Your leaves are clawing. Too much N uptake. Coming into pre fower as u may know. Plants are very sensitive. And any overfeeding will show up much easier. And also u got serious mag issues. Epsom Salt, u can add it to your soil. And as your plants are still young in the flip stage. You can use a lighter mix of 100ppm of ES added to tap. And use it as a foliar spray. As by the time your add it to soil. It'll take a few days to fix it. And she's digress and get worse. So, 150ppm for soil feed 6.5-7ph. And a lighter mix for your foliar. Also, I see you said you're using 2 600w lights 1 led & 1 bulb. Its very early to be given such large amounts of light. Pre Flowering plants get light stressed very easy. This you'll know. After your turn your lights out. And if they're dropping really bad. This is too much light. The longer they take to fix themselves back up right worse it is. So, just keep that in mind

Looks female to me. pistils and what not. Use google image search to your advantage, "female vs male vs hemi cannabis" then look at the pics and find contrast or similarties.