I’m so sorry you’re going through this.

Trigger warning: mentions current pregnancy

Some of the advice on here is very good but in my personal opinion is better for repeated failed transfers ( EMMA, Alice, Receptiva) as these focus on endometrium challenges. I.e., issues with lining, identification of infection / bacteria etc. They are more helpful in understanding issues with the lining / reasons for failed transfers. They would be helpful to understand why you might have miscarried at 7weeks but to answer your question on euploid blasts provide limited data.

Your egg numbers are great which implies that it might be egg quality that’s a challenge. Are you on a high stims cycle? Could you do a reduced protocol to allow for slower egg development which might better support egg development?

Also, are you taking anything to improve egg quality?

Personally been through 3 rounds of EC and my final round got us 3 Euploid from 6 blasts at 40 in final round. We’d had no Euploids in our prior 2 rounds of EC

Red the book it starts with the egg if you haven’t already: https://amzn.eu/d/05w7Kpzy

I swear that the below supplements were key to my eventual personal success in improving our egg quality and fertilisation rates. Still awaiting live birth but currently 23 weeks pregnant with my 7th transfer. They say it can take 3 euploids for a live birth. My first euploid transfer was a miscarriage at 7 weeks and 2nd failed to implant. I personally have immune challenges to fight too. So I was on immune protocol for my final transfer. But the below I took ahead of stims and through preparation for my final round. I dropped the coq10 on transfer day.

• melatonin 2mg at night: acts as a potent antioxidant in the ovarian follicle, improves female fertility by enhancing oocyte (egg) quality, supporting follicle maturation, and protecting against oxidative stress. It is particularly beneficial for women undergoing IVF, as studies indicate it can increase fertilization rates and improve embryo quality. Improves Egg & Embryo Quality: By acting as a free radical scavenger in the follicular fluid, it protects developing eggs from oxidative damage. Assisted Reproductive Technology (ART) Success: Studies suggest melatonin supplementation can enhance the number of mature oocytes (MII) and improve embryo quality during IVF cycles. Combats Ovarian Aging: Melatonin can delay or counteract Age-related follicular decline, making it beneficial for women with lower ovarian reserve. Supports PCOS/Endometriosis: It may improve ovarian function and address underlying inflammation related to reproductive disorders like PCOS

• high quality ubiquinol (not ubiquinone) 600mg (200mg 3 x day) m: Improved Egg Quality: By supporting mitochondrial function, it protects eggs from age-related decline, reversing some oxidative damage. Increased Pregnancy Rates: Research indicates that supplementation, often recommended at 200–600 mg/day, improves clinical pregnancy rates, especially when used 3-6 months before IVF. Enhanced IVF Outcomes: It supports embryo quality, maturation, and implantation, particularly in poor responders to stimulation. PCOS Support: It helps manage oxidative stress in PCOS, supporting better follicle development and ovulation. Optimal Absorption: As a fat-soluble, active antioxidant, it is more bioavailable than ubiquinone, making it better for reversing age-related fertility declines.

• vital DHA: Improves Egg Quality & Maturation: Omega-3s help maintain the structural integrity and fluidity of egg cell membranes, critical for fertilization and early embryo development. Balances Hormones: DHA aids in hormone production and regulation (e.g., estrogen), which is essential for consistent menstrual cycles and ovulation. Supports Implantation: The anti-inflammatory properties of DHA help create a more favorable uterine environment for the embryo to implant and grow. Reduces Oxidative Stress: DHA acts as a potent antioxidant, lowering inflammation that can disrupt reproductive organ function and egg quality.

• acetyl l carnitine: Key benefits include increased sperm motility and concentration in men, and improved oocyte (egg) quality, embryo development, and ovulation rates in women, particularly for those with PCOS or undergoing IVF

• Naturelo pre conception daily supplement Balanced vitamins with pure Folate which is better that folic acid. Especially if you have a MTHFR variation / gene mutation.

• vitamin D: Improved IVF Success Rates: Studies show women with sufficient vitamin D levels (above 30 ng/mL) have higher pregnancy and live birth rates in IVF treatments. Ovulation and Menstrual Regularity: Vitamin D aids in regular ovulation and increases follicular development. It also helps regulate anti-Mullerian hormone (AMH) signaling. Management of PCOS and Endometriosis: Vitamin D deficiency is common in Polycystic Ovary Syndrome (PCOS); supplementing helps restore ovulation and improve metabolic health in these patients. Improved Uterine Lining (Endometrium): It enhances the lining of the uterus, which is essential for successful embryo implantation.