Introduction: A Successful Pregnancy Is Never a One‑Person Effort

In my consultation room at Olympia Reproductive Medical Center, Cambodia, I often encounter this scenario: a couple comes for consultation together. The woman has undergone detailed ovarian function, hormone level, and uterine examinations, while the man feels “there should be no problem with me” and is reluctant to do a semen analysis.

It is only when the test results come back that the problem is found to lie precisely in sperm quality.

Pregnancy is a miracle of life accomplished jointly by sperm and egg. Sperm quality determines the “other half” of a successful pregnancy. Today, from a doctor’s perspective, I would like to talk seriously with you about: Why is sperm quality so important? How does it affect fertilisation and embryo development? And if sperm quality is not ideal, what can we do?

1. What Role Does Sperm Play in Fertilisation and Embryo Formation?

Many people think sperm is merely a vehicle that “delivers genes.” In fact, the role of sperm goes far beyond that.

1. Providing Half of the Genetic Material
Sperm carries 23 chromosomes from the father. When combined with the 23 chromosomes from the egg, a fertilised egg with a complete set of 46 chromosomes is formed. Whether the sperm’s chromosomes are normal directly affects whether the embryo can develop healthily.

2. Activating the Egg and Initiating Embryo Development
After the sperm enters the egg, it triggers the egg to complete meiosis and initiates a series of complex biochemical reactions, marking the official beginning of a new life. If the sperm’s activating capacity is insufficient, the fertilisation process may not be completed.

3. Influencing Early Embryo Development
Recent studies have found that sperm not only provides DNA but also carries RNA fragments, proteins, and epigenetic information. These substances may influence gene expression and developmental potential in the early embryo.

4. Being Associated with Miscarriage Risk
Sperm chromosomal abnormalities or high DNA fragmentation rates may increase the risk of fertilisation failure, embryonic developmental arrest, and early miscarriage.

Therefore, sperm quality affects not only “whether fertilisation can occur” but also “whether the embryo is good and whether it can be maintained.”

2. What Key Parameters Do Doctors Examine to Assess Male Fertility?

In a reproductive medical centre, doctors usually assess male fertility through semen analysis. Among these, the three most important parameters are:

1. Sperm Count (Concentration and Total Number)
Sperm count refers to the number of sperm per millilitre of semen and the total number of sperm in one ejaculation. Insufficient count (oligozoospermia) reduces the chance of sperm meeting the egg and increases the difficulty of fertilisation.

2. Sperm Motility
Motility refers to the ability of sperm to swim forward. Sperm need to swim through the female reproductive tract and eventually reach the fallopian tube to meet the egg. If motility is low (asthenozoospermia), sperm may be unable to reach the site of fertilisation.

3. Sperm Morphology
Morphology refers to whether the sperm’s appearance is normal, including the head, midpiece, and tail. If the proportion of normally shaped sperm is too low (teratozoospermia), it may affect the sperm’s ability to penetrate the egg.

In addition to these three major parameters, doctors may further examine sperm DNA fragmentation rate, seminal plasma biochemistry, and anti‑sperm antibodies to more comprehensively assess male fertility.

3. What Impact Does Poor Sperm Quality Have?

If sperm count is insufficient or motility is low, it may increase the difficulty of fertilisation. Specifically:

• Difficulty conceiving naturally: Sperm cannot effectively reach the egg or cannot penetrate the egg’s outer corona radiata and zona pellucida.

• Decreased fertilisation rate: In conventional IVF, poor sperm quality may lead to fertilisation failure or a low fertilisation rate.

• Affected embryo quality: Sperm DNA damage may affect embryonic developmental potential, leading to low embryo grading or developmental arrest.

• Increased miscarriage risk: Sperm chromosomal abnormalities or high DNA fragmentation rates are associated with an increased risk of early miscarriage.

• Repeated IVF failure: In some recurrent failure cases, the root cause lies in male factors that have not been fully assessed and addressed.

This is why we always emphasise: In the evaluation of infertility, male factors must never be absent.

4. What If Sperm Quality Is Not Ideal? ICSI Technology Can Help

If semen analysis shows low sperm count, low motility, or poor morphology, doctors will develop a personalised plan based on the specific situation. Among these, ICSI (intracytoplasmic sperm injection) is a very important technique.

How is ICSI performed?
During ICSI, the embryologist, under a high‑power microscope, selects a single sperm with relatively the best morphology and motility from the processed sperm sample, and uses an extremely fine injection needle to inject it directly into the egg to help achieve fertilisation.

When is ICSI suitable?

• Severe oligozoospermia, asthenozoospermia, or teratozoospermia;

• Obstructive azoospermia (sperm obtained through testicular or epididymal aspiration);

• Previous IVF fertilisation failure or extremely low fertilisation rate;

• High sperm DNA fragmentation rate;

• Situations requiring surgical sperm retrieval.

Advantages of ICSI:

• Bypasses the barrier of natural sperm penetration into the egg and directly achieves fertilisation;

• Requires only a very small number of usable sperm;

• Significantly improves fertilisation rates for patients with severe male factors.

Of course, ICSI cannot “repair” the sperm itself, but at the laboratory level, it can help families with natural fertilisation difficulties obtain transferable embryos.

5. Why Must Both Male and Female Partners Be Assessed When Developing an IVF Plan?

At Olympia Reproductive Medical Center, Cambodia, we always adhere to one principle: Assessing both male and female reproductive health simultaneously is an important part of developing an IVF treatment plan.

The reasons are simple:

• The cause may come from either partner: In infertility, about 40%‑50% is related to male factors, or both partners may have factors simultaneously.

• Technology selection depends on both partners’ conditions: Should conventional IVF or ICSI be chosen? Is PGT screening needed? Is donor sperm needed? These decisions all depend on the assessment results of both partners.

• Improving efficiency and avoiding detours: If only the woman is examined, it may take repeated failures before the man is examined, wasting time and embryos.

• More precise personalised plans: Only through comprehensive assessment can a truly suitable ovulation induction, fertilisation, and transfer strategy be developed for the couple.

Therefore, we recommend that for every couple preparing for IVF treatment, the man should complete semen analysis and related examinations as early as possible, in parallel with the woman’s examinations.

6. Olympia Reproductive Medical Center, Cambodia – Male Fertility Assessment and ICSI Technical Support

Olympia Reproductive Medical Center (ORC), Cambodia, is officially approved by Cambodia’s Ministry of Health, Ministry of Commerce, and other relevant authorities, and is wholly owned by Singapore International Women & Children Management Pte. Ltd. In male fertility assessment and ICSI technology, we offer the following advantages:

• Comprehensive assessment system: Semen analysis, sperm morphology, sperm DNA fragmentation rate, and other tests to comprehensively assess male fertility.

• Mature ICSI technology: Our embryologist team is highly experienced and can precisely perform single sperm injection under a high‑power microscope.

• Third‑generation IVF PGT technology: When embryo genetic screening is required, comprehensive and precise screening of all 23 pairs of chromosomes can be performed.

• Authoritative expert team: Medical Director Dr. Lin Mingde has over 30 years of experience in reproductive medicine research; Chief Consultant Dr. Chartree is a Professor at Chulalongkorn University, Thailand, and a leading authority on third‑generation IVF in Thailand.

• Supportive open policies: Cambodia supports donor sperm, donor eggs, HIV sperm washing, and other assisted reproductive services, with legal and compliant procedures.

• Confidential and caring service: Membership and appointment‑based system, offering one‑on‑one private consultation rooms and multilingual services (Chinese, English, Khmer).

Conclusion: A Successful Pregnancy Requires the Joint Efforts of Sperm and Egg

Sperm quality is the “other half” that determines a successful pregnancy. It affects fertilisation, affects the embryo, and affects pregnancy outcomes. Whether you are preparing for natural conception or about to undergo IVF treatment, please do not overlook the assessment of male factors.

At Olympia Reproductive Medical Center, Cambodia, we focus on both male and female reproductive health, developing scientific, precise, and personalised IVF treatment plans for you.

If you have any questions about sperm quality or male fertility, please feel free to contact us. We take every question seriously.

Technology assists pregnancy, love continues. Your journey to parenthood begins here.

Olympia Reproductive Medical Center (ORC), Cambodia

• Address: Building C5, Olympia City, No. 161, Sangkat Chey, Phnom Penh, Cambodia

• Hotline: +855 715158899, +86 15005080508

• Service Languages: Chinese, English, Khmer, and other multilingual services