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
Consent in Everyday Life: How Consent, Pressure, and Boundaries Work Day to Day
Consent is more than a yes or no.
Different libido in a relationship: how couples can handle desire mismatch without blame
Different libido is common in relationships and does not on its own tell you anything about love, attraction, or the value of the relationship.
Sex under trying-to-conceive pressure: how timing, expectations, and goal mode wear down intimacy
When trying to conceive turns sex into fertile days, tests, and hope alone, it loses ease quickly.
Ghosting on the fertility journey: when a contact suddenly disappears
When a contact disappears on the fertility journey, it is not just disappointment.
Fertility Budget: Planning Treatment, Extra Costs, and a Realistic Contingency
A fertility budget works best when diagnostics, treatment, medication, travel, and a contingency are planned together.
Donor siblings and DNA tests: what families need to plan for early
Donor siblings are children who share a genetic link but grow up in different families.
Carrier screening before sperm donation: when genetic testing is most useful
Carrier screening, or carrier testing, can be useful before sperm donation, but only when the question is clear.
Sexting, Nudes and Privacy: a Practical Guide to Consent, Sharing, and Digital Traces
For many people, sexting is already part of dating, relationships, and casual intimacy.
Aftercare After Sex: How Closeness, Calm, and Real Connection Make a Difference
Good sex does not end with orgasm.
How soon can you get pregnant after giving birth?
Fertility can return before the first period. This guide explains timing, breastfeeding patterns, LAM, pregnancy tests, contraception, and trying for another baby.
Postpartum Contraception: Which Options Make Sense and When
After birth, the body does not return to its old rhythm right away.
Period hasn’t arrived but you’re not pregnant? Common reasons and when to get checked
When a period has not arrived, pregnancy is the first thing many people think about.
Can you get pregnant if you go to the washroom right after sex?
Short answer: no.
Can stress delay ovulation in a cycle?
Stress is not a simple switch, but it can measurably delay a cycle or make it less predictable.
Can pregnancy happen without penetration?
Yes, but only if fresh sperm or semen-containing fluid actually reaches the vulva or the vagina.
Pregnant after what seemed like a period? Understanding bleeding during pregnancy
You cannot have a true period during pregnancy, but you can bleed. What matters is the pattern, accompanying symptoms and medical assessment.
Spotting before your period: what it can mean and when to get it checked
Spotting before your period usually means only a small amount of blood, but there are quite a few possible causes.
Fertility, Odds, and Hope in Trying to Conceive: What Your Chances Really Mean
When people talk about fertility, odds, and hope in trying to conceive, three different layers often get compressed into one sentence.
Spacing between pregnancies after birth: why the gap matters medically
The gap between pregnancies is not only a family planning question.
Pubic Hair Removal and Pubic Hair: Sexual Satisfaction, Body Image, and the Real Risks
Pubic hair removal is common and is often tied to feeling clean, attractiveness, or partner preferences.
Low Sexual Desire and Alexithymia: Is There a Link?
Alexithymia mainly describes difficulty recognizing feelings, putting them into words, and distinguishing them from bodily signals.
Vaginal depth during arousal: what changes and what does not
Yes, sexual arousal changes the vagina functionally.