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
Ovulation Trackers Compared: LH Tests, Temperature Trackers, Rings and Apps
Ovulation trackers are tools that narrow fertile days using hormones, temperature, or body signs you can observe yourself.
HIV self-test: how reliable home testing is, when it works, and what a negative result really means
An HIV self-test can give quick clarity, but only if you use it at the right time and understand the result properly.
Who among us should carry the pregnancy? How lesbian couples can decide fairly and in a medically sensible way
Deciding who should take the pregnancy role is rarely something couples can settle by emotion alone.
Reciprocal IVF: process, role choices, odds, and legal questions in India
In reciprocal IVF, one partner provides the eggs and the other becomes pregnant.
Home insemination kits: contents, benefits, risks - what really helps
Home insemination kits are single-use sets intended for at-home use: a syringe without a needle places the sample close to the cervix.
Ovarian stimulation: the process, medicines, risks, and what really matters in IUI, IVF and ICSI
Ovarian stimulation does not automatically mean producing many eggs.
Natural Insemination: Does It Really Mean Better Success?
Natural insemination means trying to conceive through unprotected sex with a donor.
Questions to ask your sperm donor before moving ahead
If you are planning private sperm donation, a gut check is not enough.
How do I ask someone whether they can be my sperm donor?
Asking somebody to consider becoming your sperm donor is a serious and deeply personal step.
Is Your Biological Clock Ticking? 7 Clear Signs and What to Do Next
If you feel like your biological clock is ticking, it is usually about more than age alone.
Getting pregnant as a single woman: practical routes, real risks, and a clear plan
Getting pregnant as a single woman is fully possible today, but not every route is equally safe, legal, or manageable.
Social freezing: egg freezing – steps, chances, risks, costs and alternatives
Social freezing means freezing your eggs earlier in life so they can potentially be used later in fertility treatment.
Dating as a single parent: clear start, safe boundaries, steady progress
Dating can work without overwhelming your everyday routine.
Cross-border fertility: what really matters when treatment happens abroad
Cross-border fertility care can shorten waiting times, widen donor options, or make treatment possible that is not realistically available at home.
Understanding semen: what is normal, what affects quality, and when a medical check is sensible
Semen can vary in volume, colour, and consistency more than many people expect.
Supplements for Conception: A Practical Guide to Folic Acid, Iodine, Vitamin D, Q10 and Inositol
If you search for fertility vitamins, you quickly land on product pages with long ingredient lists and very large promises.
Private sperm donation: Which health checks are advisable and what should you insist on?
Health certificates can reduce the risk of infections and unexpected medical problems. They cannot reduce it to zero. This is not a pessimistic view, but the core of diagnostics: tests have limitations, and something can change between the time of testing and the donation.
Could my child develop mental illness if I have mental health problems?
Many people with depression, anxiety, ADHD, trauma, or severe mental illness know the thought: What if I pass this on to my child?
Mental Health and Fertility: What Really Matters With Depression, Anxiety, Trauma, and Psychiatric Medicines
When trying to conceive intersects with depression, anxiety, trauma, or psychiatric medicines, the topic can shift from hope to pressure very quickly.
Testicular torsion: Symptoms, time window and what to do immediately
In testicular torsion, the testicle twists around the spermatic cord. Blood vessels and the vas deferens run through this cord. If the blood supply is cut off, the testicular tissue can be damaged within a few hours.
Undescended testicle in children: causes, diagnostics, treatment, and why timing matters
An undescended testicle means one or both testicles are not permanently located in the scrotum.
Is there an age limit for fertility treatment?
There is no one age limit that applies everywhere.