https://www.dlsite.com/maniax/work/=/product_id/RJ340093.html

Base +9, NonVerba +1, gigiriva +6, elgringo +67, Shota_Cried_WolfGirl +6

This is my absolute favourite fetish - guy turned into girl by futa, gets impregnated by said futa. I'm hoping for a quick translation!

Base +6, proxy +6, Renai Idenshi XX +6, Kraftz +6, NonVerba +1, gigiriva +6, DRAGONRULER +6, xyonius +6, kirakabuki +6, itsatess +6, everlicha -6, tester545 +7, fuckiecookie +22, and 16 more...

@Universal_Lover can you recommend others?

Base +2, Huskyking +6, allenwalker39 +6, JoeGy +6

女体化させてんじゃねえぞ！ぶっ殺すぞ！！！！

Base +6, fuckiecookie -22, Hidde -8, poiu7000 -6, Benny-boy -29, yrsa9425 -6

@ioeito7esi
Unfortunately, not that many of them around.

The Abdominal Pregnancy series by Chimosaku, which is excellent!
There's ふた×男のあれ on *****, which isn't on e-hentai, but is still in english and good.
クラベルとミオゾティス～人外夫婦の初夜～ from Chifuyu - not translated and a bit weird (think actual tentacle hentai and cuntboy), but it's still decent.
Joken Kokka Ni Okeru Konin To Kazoku Seikatsu by Yukishige - bit fucked up this one. Still sexy.
ふたなり魔王に孕まされ on ***** again (doesn't appear to have an artist attached to it).
妖怪小話 by Kizaru.
Eromanga Nihon Mukashibanashi by Emons (again, pretty fucked up).
TSF Monogatari by Shindol, the futa parts.
The Holy Band Of The Jewel Knight and Seikishichou Leon - Holy Knight Captain Leon by Kouji.
Hokoritakaki Karibito ♂ Wa Majuu-Sama No Pet ♀ Ni Otosarechaimashita and Hero TS Kako Kaihen ~Anata Wa Zako Sentouin No Ko Datta Yo Ne~ by Hiiragi Popura.
Echidna-sama no Himatsubushi Saikasou by Kirisaki Byakko.
Even though I became a hero, I lost to a female slime and as a result I got her child by Tsukueno Elf (untranslated).
Immoral Yuri Heaven _The Husband is made female and trained while his wife is bed by a woman by Kouya (this one features rather severe NTR).
Male-Female Reversal - Trying to Conceive by Setouchi Seiyaku (one of my personal favourites).
Maiden Carnation series by Marneko (excellent one).
Kyuukyoku No Milk by Kojika is a bit odd, but good.
Takao, Tanetsuke Itashimasu! by Kurosaki Bunta.
Hentai Futago series by Kanoe (incest)
Asa Onna Na Ore To Futanarikko Ojousama by Marneko (no impregnation, but pretty sexy).
Mavukare Mahou Shoujo! by Chaccu (only partly translated, unfortunately).
Meijoushigatai Mono No Boutoku Tekina Kakudo Toka by Dulce-Q (love this one!).

That's all I can think of for right now.

Base +6, sanae123456 +6, Vilis +26, Kudou Emika +6, reroda +14, gigiriva +6, samuele +6, Insert1021655034 +6, xyonius +6, adelacvgaoiro +6, Cisal +6, roasted1111 +6, itsatess +6, and 16 more...

This artwork is too good!Thanks for sharing

Base +5, FertyJukli +10

哦这感觉太怪了

Base +6

我也想被扶她妹妹透

Base +5, HermanP +6

可惜看不懂，这个真的戳我xp，有扶她 有女友，女友还愿意插自己

Base +6, 神渊之龙 +6, HermanP +6

@Universal_Lover wow, thanks!

Base +2, Cisal +6, JoeGy +6, Shota_Cried_WolfGirl +6

NTR'd by futanari into a throuple situation. I love it. Especially when the guy is feminized or full on gender swapped.

Base +6, yaque +6, Shota_Cried_WolfGirl +6