Learn Spanish (Latin America): Si la natalidad baja, no hay ningún crecimiento. - If the birth rate drops, there is no growth.

In Spanish, you never use the present subjunctive directly after si (if). Even though the condition might feel hypothetical, standard 'if' statements about realistic present or future possibilities always take the indicative. You would only use the subjunctive after si if it were a past subjunctive expressing an unlikely or impossible scenario (Si la natalidad bajara).

Why do we use 'ningún' here instead of 'ninguno'?

Ninguno drops its final -o and adds an accent to become ningún whenever it comes directly before a masculine singular noun, like crecimiento in this sentence. You would use ninguno only as a pronoun when the noun is omitted, like if you just said no hay ninguno (there is not any).

Is 'la natalidad' the only way to say 'birth rate'?

La natalidad specifically refers to the birth rate or natality of a population. You might also hear la tasa de natalidad, which means literally 'the rate of natality,' but in most everyday contexts, just saying la natalidad is the most natural way to express this concept.

How would I express this same idea using the current lesson's structure with 'el hecho de que'?