Philipp Marx
Founder of RattleStork
Philipp Marx is a founder of RattleStork and a former international sperm donor. He writes from first-hand experience about sperm donation, co-parenting, and alternative paths to parenthood.
Before founding RattleStork, Philipp donated sperm in several countries. That experience showed him how differently people approach donor conception, trust, personal boundaries, and co-parenting.
At RattleStork, he combines that perspective with publicly available sources and practical guidance for donors, recipients, and prospective co-parents. His personal experience is not a substitute for medical or legal advice.
Articles by this author
Total published articles:220
Vasectomy reversal: procedure, success chances, costs and alternatives
A vasectomy reversal is microsurgery that reconnects the vas deferens after a vasectomy.
Tubal reversal after sterilisation: success rates, procedure, and alternatives
Tubal reversal is surgery that aims to make the fallopian tubes open again after sterilisation so that pregnancy can be possible again.
Fertility treatment costs 2026 in the UK: IUI, IVF, ICSI, medication, NHS funding, and self-pay
Fertility treatment in the UK is rarely only a medical decision and is often a financial planning issue as well.
Paperwork after birth in the UK: checklist, deadlines, and applications in 2026
After birth, recovery, sleep deprivation, and new responsibility all begin at once.
Polycystic ovary syndrome (PCOS): symptoms, diagnosis, treatment, and trying to conceive
PCOS is a common hormonal and metabolic pattern that can affect your periods, skin, weight, and fertility.
Chlamydia in 2025 - Impact on Fertility, Symptoms & Effective Prevention
Chlamydia is the most common curable sexually transmitted infection (STI) .
Fertility & Religion 2025: How faith traditions view sperm donation, egg donation, IVF/IUI and surrogacy
This overview explains how major faith traditions today approach sperm donation - with attention to origins, lineage, openness versus anonymity, family roles and identity rights.
Worldwide birth rate decline: fertility crisis, reasons, and solutions
A declining birth rate means that the average number of children per woman (the total fertility rate) has been falling for decades in many countries.
Female biological clock - fertility from 35, ovarian reserve and egg quality
Fertility changes gradually: it becomes measurable in the early 30s, accelerates from 35 and is markedly reduced from 40.
Coming off the pill: how to plan the transition safely and without panic
If you want to come off the pill, a clear plan helps more than alarmist advice.
Female infertility: causes, assessment, and treatment explained clearly
When pregnancy does not happen despite trying to conceive, a clear plan helps more than guesswork.
Male infertility: causes, diagnostics and modern treatment options
Unfulfilled desire to have children is for many couples one of the most stressful phases in life - and yet the image that the problem “is usually the woman’s” persists.
Delaying menopause: evidence-based strategies for diet and lifestyle
Many people wonder whether you can delay menopause and what really affects the timing.
Get pregnant faster: what really helps and when to seek medical advice
If you want to get pregnant faster, good timing matters far more than internet myths.
Preterm birth: causes, warning signs and treatment
A preterm birth is a birth before 37 completed weeks of pregnancy.
Miscarriage 2026: causes, warning signs, treatment, and finding steadiness again
A miscarriage is a pregnancy loss in the first weeks or months and can be physically and emotionally draining.
The biological clock in men: How age reduces sperm quality and fertility
Male fertility is not timeless.
Pavel Durov & the Serial-Donor Debate 2025 - When One Sperm Donation Means 50, 100 or 1,000 Children
In June 2025, Telegram founder Pavel Durov astonished the public when he revealed that he has already fathered more than 100 children -six within committed relationships, but the majority through sperm donations across twelve countries.
How do I explain to my child they were conceived through sperm donation?
Sperm donation means using sperm from a donor to make a pregnancy possible.
The History of Sperm Donation - From Secret Experiments to the DNA-Test Era
Sperm donation is now routine for single mothers, LGBTQ+ couples and heterosexual couples facing male infertility.
At-Home DNA Kits 2025 - Your Guide to Genes, Law & Privacy
A home DNA kit now costs little more than a cinema ticket yet can answer questions such as Where do my ancestors come from?
Sperm Donation in Islam 2025: Nasab, Marriage, Donor Anonymity, Legal Schools & Country Practice
Whether sperm donation is permissible in Islam is assessed differently across legal schools and countries.