^
Plastic Cup, Hottie Mommie ha. Wag yung usual na Supot ng
Sago't Gulaman.

Yes. The saliva is bound to ruin the specimen. Hindi magiging accurate yung bilangan. Kumbaga sa Election may tampering.

"
Straight to the Cup" ang systema which should give them a standard of what, under that particular condition, can be considered an effective level of count.
^^^
Anyway, on the original question, and
constructively this time around

....
Okay, if he doesn't really want to cooperate then the best thing I can suggest is for you to methodically work on instilling some sense into him.
Most guys kasi are afraid, have reservations, or refuse to be subjected to anything that questions and challenges their Masculinity. Lalo na the typical Pinoy Male. Why did I single out the Typical Pinoy Male? Because masyado kaming mag bigay importansya sa Pagka Lalaki. Sa Pagka Brusko. That certain conditions that threatens our Masculinity are dealt with Unreasonably. Again, that's the Typical Pinoy Male Attitude.
So the wisest move is for you to little by little introduce to him various conditions that could be affecting his ability to be a father. More as a Health concern and never as a
Disability. The difference between the two is as clear as "
You have high blood sugar" and "
You are diabetic". So making him realize the difference and the reason behind the test, may get him a bit inclined to cooperate.
Perhaps present what-could-be discovered as possible problems as something that gets in the way of being potent, ...este, Perfect na lang para mas magustuhan niya.

Most guys din kasi directly associate low sperm level with outright Sterility, Impotency, and eventually Erection problems. Which causes them to be wary of tests that could question their masculinity, and more so, afraid to be deemed "
sexually incapable".

Like a good portion of the Pinoy population detest vasectomy because a lot of them heard that it makes you go limp.

Tapos yung iba who know better, ayaw pa rin para maka-sigurado lang.

Again those things that could a guy's better judgment can be resolved by convincing them, bit by bit.
Pag hindi pa rin siya pumayag, make a website and write there that certain studies show that unattended Low Sperm Count Problems have been proven to Lead to the introduction of Female Hormones into the Male system in as quickly as 6 months, thus making these men go totally limp below alongside developing perky breasts.

Yon. Baka siya pa kamo mag set ng appointment.

Good luck!