科學家發現雌性動物被內射後性慾減少的機制

https://www.biorxiv.org/content/10.1101/2023.09.08.556711v2

SUMMARY
Male ejaculation acutely suppresses sexual motivation in male mice. In contrast, relatively little is known about how male ejaculation affects sexual motivation and sexual behavior in female mice. How the brain responds to completion of mating is also unclear. Here, by using self-paced mating assay, we first demonstrate that female mice show decreased sexual motivation acutely after experiencing male ejaculation. By using brain-wide analysis of activity-dependent labeling, we next pinpointed the medial preoptic area as a brain region strongly activated during the post-ejaculatory period. Furthermore, using freely moving in vivo calcium imaging to compare neural activity of inhibitory and excitatory neurons in the medial preoptic area, we revealed that a subset of the neurons in this region respond significantly and specifically to male ejaculation but not to female-to-male sniffing or to male mounting. While there were excitatory and inhibitory neurons that showed increased response to male ejaculation, the response magnitude as well as the proportion of neurons responding to the event was significantly larger in the inhibitory neuron population. Next, by unbiased classification of their responses, we also found a subpopulation of neurons that increase their activity late after the onset of male ejaculation. These neurons were all inhibitory indicating that male ejaculation induces a prolonged inhibitory activity in the medial preoptic area. Lastly, we found that chemogenetic activation of medial preoptic area neurons that were active during post-ejaculatory period, but not during appetitive or consummatory periods, were sufficient to suppress female sexual motivation. Together, our data illuminate the importance of medial preoptic area as a brain node which encodes a negative signal that sustains low sexual motivation state after the female mice experience ejaculation.

即係點呀屌，好想中山呀

即係女版聖人模式

有冇人想減少性慾

唔怪得啲女人出面俾契家佬中山完唔俾老公搞

聖女貞德模式

TLDR ，戴套會唔會都trigger？

證明男人鐘意中出條女係有原因
條女唔係自己中出，就會出去搵其他男人中出

唔怪得戴套唔中出條女會特別容易偷食

連登基佬日日研究啦

要間唔中中出

想知

增加

孫中出

一定要中出

老鼠係咁啫 唔代表人類都係
要再深入研究先知

一定要中出

原來要中出啲賤女人 係有原因

唔係專業

但我睇篇文好似主力都係女性腦部對行為反應

唔係好覺關物質交換事
但等專業Bio類會員答

點幫老鼠帶套？

我都想知

中速 一定係最好

中出完屎溝精
趷高屎忽
一滴二滴三滴

催眠雙方獸性更加興奮
詳情參考消防忌廉菊花搽

下次希望佢哋搵我嚟做研究