Disclaimer : i'm not asking anyone to stop their treatment. Just discussing on an interesting topic independently.

Hello,

Based on the scientific studies below, it is accepted that:

- A balanced ratio of estrogen to testosterone is necessary for the proper development of a male fetus during a specific window of pregnancy. https://pmc.ncbi.nlm.nih.gov/articles/PMC7458408/

- Low-dose aspirin restores blood flow by doubling estrogen above normal levels in the placenta through the overexpression of CYP19A1 (increased aromatase activity). https://pubmed.ncbi.nlm.nih.gov/39343179/
Graphs : https://imgur.com/a/dyjfHUT (CP19A1 = aromatase expression)

- Low-dose aspirin is generally prescribed during a second pregnancy following a first pregnancy complicated by preeclampsia.

- The use of COX inhibitors (aspirin) increases the risk of cryptorchidism and hypospadias - conditions that arise from hormonal disruption. https://pubmed.ncbi.nlm.nih.gov/20805751/

- "Excess of estrogen signaling (through DES in vivo or EE2 in vitro) cause similar defects to penis development." https://pubmed.ncbi.nlm.nih.gov/31225966/

Question :  Can low-dose aspirin may cause reduced masculinization due to the doubling of the estrogen ratio above normal range? (outside cryptorchidism or hypospadias).

By masculinization in a scientific meaning: the degree of genital development - and any disruptions to it (like ambiguous genitalia) - as well as brain differentiation. These are biological facts driven by various hormones. I'm trying to find a new potential answer for men who live with cryptorchidism, hypospadias, or a micropenis.

If so, what are the other potential consequences for a male fetus?

Link for the graphs : https://imgur.com/a/dyjfHUT
(CP19A1 = aromatase expression).

Other interesting sources :

https://pubmed.ncbi.nlm.nih.gov/30763313/

Thank you,

Is tamacco possible.

Hello I just had a question cross my mind as I was studying Inheritance

why is it that inbreeding in humans results in deformities/diseases/compromised immune systems whereas other animals (mongoose and etc) that are offspring of inbreeding turn out to be completely normal?

Its been a whileee since I last took a biology class so im so so sorry if I sound silly but I living learning history now 😭😭 Let's see if my question makes sense.
Wouldn't the "before humans" species also exist in north/south america like how they existed in Europe and Asia? If they did, how come they didn't develop civilizations/become humans at the same rate or even before mesopotamia? If Mesopotamia was really the first civilization would that mean that later civilizations like mayans and incans are technically descendeds from mesopotamians since they had go travel through water to get to the americas? Wouldn't there be like species like Australopithecus or even wayyy earlier human ancestor also exist in North/South Ameica therefore develope at the same time? Sorry for the long question. Ive been into evolution and history overall lately 😭

Why can't they just have both somatic nervous system and ANS like digestion, excretion, eye movement, sneezing, etc.? I'm aware that involuntary functions are just more energy efficient though.

Circulation is necessary for survival and sexual function is necessary for reproduction.

If the individual can't survive they can't reproduce. If the individual can't reproduce then their genes will simply be weeded out.

P.s. I spelled out somatic to avoid confusion with sympathetic

What is the actual biological purpose of yawning and what is happening in the brain and body that causes it?

Sorry, idk what flair to use.
This question came in my head and i cannot lose it and idk what to google. Also, english is not my first language.

I’ve learned about those bacteria (i think) that can live in warm freshwater lakes for example. I’m kinda into the prepping stuff and learning how to survive in the wild or in case of an apocalypse. So i thought… Would boiling lake water kill those bacteria?
Because i always see people crafting filters with like pebbles (small stones?) and sand or something, idk how to describe. But then there would still be a risk for the bacteria to live in there, right?

One idea I’m interested in is imagining a far-future setting where space travel is completely normal and animals have lived on other planets for thousands or even millions of years. How might different atmospheres, gravity, climates, ecosystems, and available resources drive their evolution?

I’m especially interested in the role humans could play in this process through genetic engineering, artificial selection, or deliberately influencing an ecosystem. Even relatively small changes could potentially lead to very different evolutionary paths over long periods of time.

So I’m wondering: What kinds of alien animals could realistically evolve under different planetary conditions? What evolutionary paths are plausible but haven't existed on Earth? And what species or adaptations might we be overlooking because they never had the right environmental pressures to evolve here?

I’d love to hear from people who know more about evolutionary biology, astrobiology, speculative evolution, or related fields.

so to clarify could we give edible plants cancer then sterilize said "produce" and use it as compost or animal feed? and as a follow up could we give trees cancer and use said wood for building/fuel/carbon reduction?

I've been watching documentaries on UG99 and wheat blast. I am a lay person just interested in what could go wrong in the future. I see lots on pandemics and viruses which is fair to worry about. I don't see much on fungus killing crops and our food supply so I wonder if its not a major concern or if its something that is being overlooked by public health? What is your view?

This is regarding AP Biology. Any info helps! I really want to do well in this class and can’t let it tank my GPA.

When I was a baby my hair was kind of ginger/reddish, but as I got older it gradually got darker and is basically black now.

However when I’m standing in front of a mirror with sunlight hitting my hair, I can still see a copper/reddish color in it. In normal lighting it just looks black.

Is this just a normal thing that happens when hair gets darker with age? And does the fact that it was ginger when I was a baby mean I actually had naturally red hair, or could baby hair just have a different color?

If I come home after school and then take a nap for a few hours can I then stay up the same night (as in sleep from like 4 to 9) and sleep through the whole night for only a few hours and have it count as getting 8 hours or does it need to be continuous. (So in total sleep from 4-9 and then from like 4-7)

The usual explanation as to why trees don't get cancer often in spite of being huge is that the thick cellulose around every cell wall prevent the cells from multiplying too much. But, if so, why are bone cancers so common in human smokers?

Correct me if I'm wrong but apparently when you don't sleep you accumulate particules that are bad for your brain but I'm not sure if I understand how or what this is. Can someone explain?

Is it theoretically possible for mold to evolve into a conscious and sentient being matching or even surpassing the cognitive capacity of human beings?

Imagine a human being born and raised in a safe environment where there are no other humans or animals whatsoever. They have sufficient food, water, shelter, and everything else necessary for physical survival. They also have no knowledge that any other living creatures exist.

Would their brain still develop an innate drive to seek social interaction or companionship, despite never having experienced or even understood the concept of another living being?

In other words, is the human need for social connection fundamentally biological and present independently of learning, or does it largely develop through experience with other humans?

I’m specifically asking about innate human social behavior, rather than language deprivation.

sorry if this question is odd in advance but i’m just wondering if the other sperm cells were me but slightly altered or were they like another person all together ? like was i also competing against male sperm cells and female sperm cells ? if so is it possible their genetic recombination was different meaning i could’ve had an alternate appearance or was i always going to look the way i do with the same personality ?

any answers would be greatly appreciated .

​

Now I know what you guys are saying, I guess most are tired of seeing the stereotypes. But after a bit of checking over the average penile dimensions of the world. I'm seeing that despite length being relatively the same, at around 5-5.5 (13-14cm), the girth is very different. The 2 most recent data of average girth in Vietnam and China were 10.42 and 10.75 (the equivalent of 8-10th percentile in most Western countries). Japan had similar problems but not enough research along with Thailand and Philippines all around 10-11 benchmark (compared to 12+ of most western countries). Is there validity to this or am i just overlooking something (note: I am asian and this is not to spread hate or stereotypes I am just genuinely curious on the semantics). I see people on Reddit being scared because their girth is 4 inches or sth but technically it's fine isn't it since the numbers do show that asian countries are fine.