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
Sex positions with names: the best-known variants explained clearly
Names like Missionary position, Doggy Style, Cowgirl, or Wiener Auster come up all the time, but it is often not clear what they really mean in practice.
Vasectomy: procedure, effects, risks, and follow-up
A vasectomy is a minor surgical procedure for permanent contraception.
HIV: What you should know about transmission, symptoms, tests, and treatment
This guide explains HIV clearly and without panic: what the virus is, how it spreads, which symptoms can appear, how tests should be interpreted, and why modern treatment changes so much.
HIV in Everyday Life: What Really Matters After a Diagnosis in India
This article is for people living with HIV after diagnosis in India and looks at what really matters in daily life, relationships, work, travel, and self-image.
Male contraception: condoms, vasectomy, and future hormonal options
For now, male contraception mainly means condoms or vasectomy.
Endometriosis and Fertility: When It Affects Conception and What to Do Next
Endometriosis can make conception harder, but it does not always cause infertility.Understanding the AMH level: what does it really say about fertility and trying for a baby?
AMH is a useful clue when you are trying for a baby and want to understand egg reserve.
Checking fallopian tube patency: HSG, HyCoSy, what happens during the test, pain and what it can show
When pregnancy has not happened yet, checking the fallopian tubes is often a sensible next step.The Two-Week Wait: Symptoms, Progesterone, Test Timing, and What Not to Overread
The two-week wait is the stretch between ovulation and the point when a pregnancy test becomes meaningful.
Letrozole for conception support: how it works, treatment steps, side effects, and when it is used
Letrozole is often used in fertility care when ovulation does not happen regularly or needs a targeted push.Clomiphene or Letrozole: What Is the Difference in Cycle Treatment and Ovulation Induction?
Clomiphene and letrozole are both used when a cycle needs support or ovulation needs to be triggered on purpose.
Embryo Transfer During IVF and ICSI: What Happens, Timing, What to Do Afterwards, and Realistic Expectations
Embryo transfer is the last visible step in IVF or ICSI, but the real work is preparation, timing, and the calmer period afterwards.Embryonic development day 1 to day 5: what morula and blastocyst really mean
The first five days after fertilisation can sound highly technical in fertility treatment.
Trying Again After a Miscarriage: When You Can Start and What Makes Medical Sense
After a miscarriage, the wish for another pregnancy can bring hope, pressure, and uncertainty at the same time.
What people do not say out loud when searching for a sperm donor, but mean
People often talk about profiles, values, and tests when searching for a sperm donor.What happens if the donor later wants more contact than agreed?
Contact wishes do not always remain exactly as they were discussed at the start.
When your family is not on board: how to explain alternative family planning
Not every alternative family plan is understood immediately by the people around you.Why family planning often looks more like project management than romance
Modern family planning is often not just about feeling, but also about timing, agreements, documents, and many small decisions.
Why are testicles so sensitive? Causes, warning signs, and what helps now
Testicles often react more strongly to touch, pressure, and pulling than many people expect because their position, nerve supply, and free suspension make them especially sensitive.
Vulva and vagina: the difference explained in simple terms
Vulva and vagina are often mixed up in everyday language, even though they are not the same thing.
How age, stress and lifestyle can affect sperm quality
Age, stress, sleep, smoking, alcohol, fever, weight and heat can all affect sperm quality.
Is phimosis serious? When it can be normal, when you should seek medical advice, and what helps in Indian practice
Phimosis is not automatically serious.